Microformats Wiki - User contributions [en]

audio-info-services-ufa

2008-10-15T21:42:26Z

DavidLehn:

<pre>
property album bitrate DESCRIPTION
property track copyright DESCRIPTION
property album part number DESCRIPTION
property album sample (flash applet) DESCRIPTION
property track cover image DESCRIPTION
property album owner DESCRIPTION
property album styles DESCRIPTION
property album samples (flash) DESCRIPTION
property track sample (flash applet) DESCRIPTION
property album payees DESCRIPTION
property track arranger DESCRIPTION
property album add to playlist DESCRIPTION
property album comment DESCRIPTION
property album disc count DESCRIPTION
property description DESCRIPTION
property track location DESCRIPTION
property album copyright DESCRIPTION
property track disc number DESCRIPTION
property album number of plays DESCRIPTION
property album license DESCRIPTION
property track length DESCRIPTION
property track bitrate DESCRIPTION
property album arranger DESCRIPTION
property album isrc DESCRIPTION
property album price in points DESCRIPTION
property album owner e-mail DESCRIPTION
property album ensemble DESCRIPTION
property album save to playlist DESCRIPTION
property album SKU DESCRIPTION
property track file type DESCRIPTION
property track add to playlist DESCRIPTION
property track rank DESCRIPTION
property track relationship DESCRIPTION
property album number of tracks DESCRIPTION
property album artist DESCRIPTION
property track total price DESCRIPTION
property album sample DESCRIPTION
property album p2p-based purchase DESCRIPTION
property album encoding DESCRIPTION
property album related albums DESCRIPTION
property album ean/upn DESCRIPTION
property album track count DESCRIPTION
property track comments DESCRIPTION
property track add bookmark DESCRIPTION
property track lyrics DESCRIPTION
property track isrc DESCRIPTION
property track conductor DESCRIPTION
property album also bought DESCRIPTION
property track genres DESCRIPTION
property track ensemble DESCRIPTION
property album product id DESCRIPTION
property track price DESCRIPTION
property album availability DESCRIPTION
property track payees DESCRIPTION
property album catalog id DESCRIPTION
property album conductor DESCRIPTION
property track part DESCRIPTION
property album album DESCRIPTION
property track label (popup) DESCRIPTION
property album DRM information DESCRIPTION
property track lyricist DESCRIPTION
property album artist rating DESCRIPTION
property album comments DESCRIPTION
property track part number DESCRIPTION
property album review DESCRIPTION
property album performer DESCRIPTION
property album part DESCRIPTION
property track web-based purchase DESCRIPTION
property album version DESCRIPTION
property track rating DESCRIPTION
property album artist location DESCRIPTION
property track version DESCRIPTION
property album physical-based purchase DESCRIPTION
property track album title DESCRIPTION
property album album rating DESCRIPTION
property track artist id DESCRIPTION
property track comment DESCRIPTION
property track opus DESCRIPTION
property album regular price DESCRIPTION
property album author DESCRIPTION
property track video sample DESCRIPTION
property album store price DESCRIPTION
property album web-based purchse DESCRIPTION
property album non-subscriber price DESCRIPTION
property album website DESCRIPTION
property track album DESCRIPTION
property track id DESCRIPTION
property track label DESCRIPTION
property track source media DESCRIPTION
property album composer DESCRIPTION
property album purchase (application link) DESCRIPTION
property album label DESCRIPTION
property track encoding DESCRIPTION
property track add to wishlist DESCRIPTION
property album title DESCRIPTION
property album UPC DESCRIPTION
property track summary DESCRIPTION
property album tracks DESCRIPTION
property track number of plays DESCRIPTION
property track encoded-by DESCRIPTION
property track author DESCRIPTION
property album share DESCRIPTION
property album album title DESCRIPTION
property album size DESCRIPTION
property album total length DESCRIPTION
property track performer DESCRIPTION
property track web-based purchase link DESCRIPTION
property album add to wishlist DESCRIPTION
property album language DESCRIPTION
property track label number DESCRIPTION
property album format DESCRIPTION
property album location DESCRIPTION
property track tags DESCRIPTION
property album notes DESCRIPTION
property album release date DESCRIPTION
property track played-by radio station DESCRIPTION
property track DRM information DESCRIPTION
property album add bookmark DESCRIPTION
property album quality DESCRIPTION
property track album id DESCRIPTION
property track song title DESCRIPTION
property album catalog ID DESCRIPTION
property album production credits DESCRIPTION
property album subscriber price DESCRIPTION
property album reviews DESCRIPTION
property track release date DESCRIPTION
property album price DESCRIPTION
property album savings DESCRIPTION
property album disc id DESCRIPTION
property track number DESCRIPTION
property track p2p-based purchase DESCRIPTION
property album rating DESCRIPTION
property track size DESCRIPTION
property album total price DESCRIPTION
property track format DESCRIPTION
property album disc number DESCRIPTION
property album genre DESCRIPTION
property track add to pop-list DESCRIPTION
property track sample DESCRIPTION
property track genre DESCRIPTION
property album web-based purchase DESCRIPTION
property track composer DESCRIPTION
property track reviews DESCRIPTION
property track ean/upn DESCRIPTION
property album licensing DESCRIPTION
property track price in credits DESCRIPTION
property track quality DESCRIPTION
property track license DESCRIPTION
property album cover image DESCRIPTION
property album length DESCRIPTION
property album price in credits DESCRIPTION
property track title DESCRIPTION
property album encoded-by DESCRIPTION
property album lyricist DESCRIPTION
property track artist DESCRIPTION
property track creators DESCRIPTION
property album source media DESCRIPTION
property track performance artist DESCRIPTION
property album style DESCRIPTION
property album total time DESCRIPTION
property album label catalog number DESCRIPTION
property album opus DESCRIPTION
property album country DESCRIPTION
url AudioFind http://audiofind.ru/music/album/-/Lost%20Angel/Destination/?id=591
properties album artist track title album title album label album release date track number track sample track web-based purchase album genre album web-based purchase album cover image track length track price album price description track rating album album rating album style album artist rating
url Telstra BigPond http://bigpondmusic.com/Album/The-Decemberists/The-Crane-Wife.aspx
properties album artist track title album title album label album release date track number track sample track web-based purchase album genre album web-based purchase album cover image track artist track price description track album album non-subscriber price album subscriber price track add to pop-list
url Bitmunk http://www.bitmunk.com/view/media/6068744
properties album artist album tracks album label album release date track number track web-based purchase album genre album web-based purchase album cover image track artist description track release date album sample track album track label track composer album payees track total price album p2p-based purchase track genres track payees album album title track song title track p2p-based purchase album total price
url Download Punk http://www.downloadpunk.com/?webaction=AlbumDetail&albumid=13202
properties album artist track title album title album label track sample track web-based purchase album web-based purchase album cover image track price album physical-based purchase
url FYE http://www.fye.com/Not-Too-Late-Music_stcVVproductId7456462VVcatId458211VVviewprod.htm
properties album artist track title album title album tracks album label album release date track number album genre album cover image track artist description album format album physical-based purchase album reviews album styles album product id album regular price album store price album UPC album production credits album savings
url iMusic http://imusic.libero.it/compilation.php?icom_id=105902&ptipo=pus&pid=171437
properties album artist album title album tracks album label album release date track number track sample track web-based purchase album genre album web-based purchase album cover image track length track price track release date album length album number of tracks
url AON Music http://www.omds.de/servlets/2452685121527Dispatch/31/Call?htmltemplate=./album/viewalbum.htm&lmtype=ALBUM&albumid=2310333
properties album artist track title album tracks album label track number track sample track web-based purchase album genre album web-based purchase album cover image track length track price album price album format album sample track format album bitrate album number of tracks track add bookmark album album album add bookmark
url TDC Online http://musik.tdconline.dk/servlets/2452306090224Dispatch/19/call?htmltemplate=./album/viewalbum.htm&trackid=5010526
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album web-based purchase album cover image track price album price album format album length
url Audio Lunchbox http://www.audiolunchbox.com/album?a=75751
properties album artist track title album title album tracks album label album release date track number track web-based purchase album genre album web-based purchase album cover image track length track price album price album format album bitrate album add to wishlist album sample (flash applet) track sample (flash applet) track price in credits album price in credits
url Chaos Music http://chaos.com/product.asp?intProductID=739720&intArtistID=167488
properties album artist track title album title album tracks album release date track number album genre album cover image album price description album format album physical-based purchase album add to wishlist album availability
url Sony Connect http://store.connect-europe.com/albumDetailPage.do?albumId=3260785
properties album artist track title album title album tracks album label album release date track sample track web-based purchase album genre album web-based purchase album cover image track artist track length track price album price album length
url Digirama http://www.digirama.co.nz/AlbumDetails.aspx?MediaID=578456
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album genre album web-based purchase album cover image track length track price album price album reviews album license album related albums album also bought
url eMusic http://www-v3.emusic.com/album/10917/10917324.html
properties album artist album title album tracks album label track number track sample track web-based purchase album genre album web-based purchase track length album sample album length album reviews album album rating album styles album save to playlist
url FNAC http://www.fnacmusic.com/album/7088f214-6187-4845-afdc-6391e103f67d.aspx
properties album artist track title album title album tracks track number track sample track web-based purchase album genre album web-based purchase album cover image track length track price album price description album length album add to playlist track add to playlist
url Sanity http://www.sanity.com.au/product/rockpop.asp?sku=-942394
properties album artist track title album title album tracks album label album release date track number album cover image album price description album physical-based purchase album price in points album SKU album catalog ID
url MisRolas http://www.misrolas.com/downloadmusic/album.php?id=1316
properties album artist track title album title album tracks album release date track number track sample track web-based purchase album web-based purchase album cover image track artist track price album price album reviews album number of tracks album album rating track add to wishlist
url MTV http://www.mtv.com/#/music/artist/my_chemical_romance/albums.jhtml?albumId=1367908
properties album artist track title album title album tracks album label album release date track number track sample album cover image album physical-based purchase track video sample
url Musica360 http://musica360.com/store/product_info.php?products_id=232
properties album artist track title album title album tracks track web-based purchase album web-based purchase album cover image track artist track price album price album samples (flash)
url Musicload http://www.musicload.de/item.ml?releaseid=1884260_2
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album genre album web-based purchase album cover image track artist track length track price album price album format track release date album sample album length track album track label track genre track format track rating album bitrate album rating track comments album quality track quality album comments
url Napster http://www.napster.com/view/album/index.html?id=12376484
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album web-based purchase album cover image track artist track length album price description track release date album sample track album track label album reviews album number of tracks album track count track album title album review album share
url PartyMob http://www.partymob.com/edl/details/default.aspx?album=2089814
properties album artist track title album title album tracks album release date track sample track web-based purchase album genre album web-based purchase album cover image track artist track length track price album price album format track release date album sample track genre track format album bitrate album number of tracks album track count album total length album quality track quality track DRM information
url Peer Impact http://www2.peerimpact.com/contentstorage-xml/album30.do?templateName=WEB-INF/conversion-templates/album30.vm&albumId=89449
properties album artist track title album title album tracks album label album release date track number track sample album genre track artist track length track price album price album format album track count album purchase (application link)
url Pure Tracks http://us.puretracks.com/catalog/details.aspx?pid=emi_094638723653
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album web-based purchase track artist track length track price album price description album length album total length album disc count track label (popup) album DRM information
url Reggae Country http://www.reggaecountry.com/Shopping/Browse.aspx?mode=item&category=209&item=35745
properties album artist track title album title album tracks album label album release date track sample track web-based purchase track artist track length track price album price album web-based purchse
url Real/Rhapsody http://www.rhapsody.com/harryconnickjr/chansonduvieuxcarrconnickonpiano3
properties album artist track title album title album tracks album label album release date track number track sample album sample
url Ruckus http://wapps.ruckus.com/cgi-bin/WebObjects/ruckus.woa/2/wo/bQ5EBCLVYbWMuHOuCRElwM/0.0.27.15.13.1.16.3.3
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album genre album web-based purchase album cover image track artist track length track album title
url Sanity http://www.sanity.com.au/product/rockpop.asp?sku=-943269
properties album artist track title album title album tracks album label album release date track number track sample album web-based purchase album cover image album price album catalog id
url Starzik SARL Album
properties album artist track title album title album tracks album label album release date track web-based purchase album genre album web-based purchase track artist track length album format track release date album length track label track genre track format album bitrate track composer track album title track size track bitrate album size track creators track performance artist
url CellCity http://www.thecellcity.com/4DACTION/CDMProductQuery?CDMCommand=fuzzyquery&CDMdepartment=music&cdmalbum=What's%20The%20Word%20Vol.%201&CDMReturnURL=/music/albumdetails.shtml]
properties album artist track title album tracks album label album release date track web-based purchase album genre track price
url top100.cn http://www.top100.cn/product/specialall/S0027876000.htm
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album genre album web-based purchase track artist track price description album sample track label track genre track comments
url Wippit http://www.wippit.com/AlbumDet.aspx?StrId=28724&StrCatType=S
properties album artist track title album title album tracks album release date track number album genre album web-based purchase track artist track price album price album format track release date track album track genre track format track size track file type track web-based purchase link
url Yanga http://yanga.ru/music/album/-/Duke%20Ellington/Jack%20The%20Bear/?id=28510
properties album artist track title album title album tracks album label album release date track number track sample track web-based purchase album genre album web-based purchase album cover image track length track price album price description album sample track rating album rating
url somesongs Album
properties track title track sample track artist track release date track rating track summary track reviews
url Magnatune http://magnatune.com/artists/albums/ammonite-recon/
properties album artist track title album title album tracks album release date track number track sample album web-based purchase album cover image track length description album length album physical-based purchase album license album artist location album total time
url SONG FIGHT! http://www.songfight.org/artistpage.php?key=15-16_puzzle&sortkey=date
properties album artist track title album title track sample album cover image description track release date album artist location
url Yes.com http://www.yes.com/
properties album artist track web-based purchase album cover image track artist track cover image track rank track played-by radio station
url MySpace http://myspace.com/theradioknives
properties album artist track title album title album tracks track sample album cover image track artist description album sample album number of plays track lyrics track number of plays
url MusicBrainz.org http://musicbrainz.org/release/1138abc1-77f4-4ba9-900d-5cf52baaf4bf.html
properties album artist track title album title album tracks track number album cover image track artist track length track album track id track relationship track artist id track album id album disc id
url Vorbis Comment Recommendations http://reactor-core.org/ogg-tagging.html
properties album artist track title album title album label album release date track number album genre album cover image track artist track length description track release date track album track label track genre album license track composer track album title track summary track copyright album part number track cover image track arranger album comment track location album copyright track disc number album arranger album isrc album ensemble track file type album encoding album ean/upn track lyrics track isrc track conductor track genres track ensemble album conductor track part track lyricist track part number album performer album part album version track version track comment track opus album author track source media album composer track encoding track encoded-by track author track performer track label number album location track tags album disc number track ean/upn track license album encoded-by album lyricist track creators album source media album label catalog number album opus
url iTunes RSS extensions http://www.apple.com/itunes/store/podcaststechspecs.html#_Toc526931673
properties track title album title track sample album genre album cover image track artist track length description track release date track format track id track summary album owner album owner e-mail album website album language track tags album licensing
url Discogs http://www.discogs.com/release/705805
properties album artist track title album title album tracks album label album release date track number album genre track artist album format album rating album catalog id album style album notes album country
</pre>

haudio

2007-07-20T21:31:10Z

DavidLehn: /* Public Domain Release */

<h1>hAudio 0.6</h1>

http://farm2.static.flickr.com/1216/604867362_da0921136a_o.png

[[haudio|hAudio]] is a simple, open, distributed format, suitable for embedding information about audio recordings in (X)HTML, Atom, RSS, and arbitrary XML. hAudio is one of several [[microformats]] open standards.

== hAudio Microformat Draft Specification ==

; Editor: [[User:ManuSporny | Manu Sporny]], [http://www.bitmunk.com/ Bitmunk] - [http://blog.digitalbazaar.com Digital Bazaar], Inc.
; Contributors: [[User:ManuSporny | Manu Sporny]], [http://www.bitmunk.com/ Bitmunk] - [http://blog.digitalbazaar.com Digital Bazaar], Inc.
: Martin McEvoy
: [[ User:AlexandreVandeSande | Alexandre Van De Sande ]] Releases all his contribution as public domain(see user page)
: Michael Johnson
: Dave Longley
: Brian Suda
: Ben Wiley Sittler
: Scott Reynen
: Frances Berriman
: James Craig
: David Janes
: Andy Mabbett
: Danny Ayers
: Rudy Desjardins
: Edward O'Connor
: Ryan King
: Chris Griego
: Brad Hafichuk
: Tantek Çelik
: Colin Barrett
: Joe Andrieu

Microformats [[#Copyright]] and [[#Patents]] statements apply.

__TOC__

== Introduction ==

It is difficult for a browser to extract semantic information about an audio recording described on a web page. Metadata such as speaker, musician, publisher, label, title of the work, release date, acquisition link, related image artwork and tags provide relevant context for the audio recording.

Having such information marked up can provide a number of benefits to the viewer. If a web browser understands that a particular web page contains a song performed by an artist, it can produce richer interactions. For example, specific searches may be performed for artists and songs via general search services such as Google and Wikipedia. Specific search services may also be queried such as MusicBrainz, The Internet Archive, FreeDB, or Bitmunk. Additionally, classification by crawlers can become more accurate. If there are 20 tracks found on a page done by the same artist, and that content consumes a significant portion of the page, it can be assumed that the page is not only about music, but also about a particular artist.

In order to enable and encourage the sharing, distribution, syndication, and aggregation of audio content, the authors propose the hAudio microformat, an open standard for distributed audio metadata. The authors have researched both numerous [[audio-info-examples]] in the wild and earlier attempts at [[audio-info-formats]], and have designed hAudio around a simple minimal schema for audio content. Feedback is encouraged on the [[haudio-feedback|hAudio feedback]] page.

=== Inspiration and Acknowledgments ===

Many thanks to the various individuals that did research and proposed ideas and discussion related to media info and audio info in general. Among the many participants are [[RodBegbie]], Dean Hudson, [http://tantek.com/log/ Tantek Çelik], [http://napsterization.org/stories/ Mary Hodder], [http://joshkinberg.com/blog/ Joshua Kinberg], ChrisMessina, and [http://onlisareinsradar.com/ Lisa Rein].

=== Scope ===

Audio content consistently share several common fields. Where possible hAudio has been based on this minimal common subset.

==== Out of scope ====

Fields that are type-specific have been omitted from hAudio. It is important that hAudio be kept simple and minimal from the start. Additional features can be added as deemed necessary by practical implementation experience.

The concept of a universal audio identifier, that is, how to identify the same audio album, song, speech, or podcast across different music and audio sites, though something very useful to have, is outside the scope of this format.

== Semantic XHTML Design Principles ==

{{semantic-xhtml-design-principles}}

== Format ==

=== In General ===
The hAudio format is based on a set of fields common to numerous audio content sites and formats in use today on the web. Where possible field names have been chosen based on those defined by the related [[hcard|hCard]] standards.

=== Schema ===

The hAudio schema consists of the following:

* hAudio ('''<code>haudio</code>''')
** '''audio-title''' required. text.
** '''contributor'''. optional. using [[hCard]].
** '''published-date'''. optional. using [[datetime-design-pattern]].
** '''rel-sample'''. optional. sample file/stream using [[rel-design-pattern]] with <code>sample</code> as the <code>mf-rel-value</code>.
** '''rel-enclosure'''. optional. full download of file using [[rel-enclosure]].
** '''rel-payment'''. optional. link to purchase process using [[rel-payment]].
** '''image-summary'''. optional. using HTML and XHTML tag <code>img</code>.
** '''category'''. optional. text.
** '''duration'''. optional. ISO-8601 time duration using [[abbr-design-pattern]] (re-used from [[hcalendar]]).
** '''price'''. optional. using [[currency-proposal]].

=== Field details ===

The fields of the hAudio schema represent the following:

==== hAudio ====

An hAudio is used to identify and describe metadata associated with an individual audio recording.

* an hAudio element is identified by class name <code>haudio</code>

==== Audio Title ====

The audio title of an audio recording is a short textual description used to identify the work among interested parties. This can be the title of a speech, song title, or short description regarding a sound effect.

* The element is identified by the class name <code>audio-title</code>.
* hAudio MUST have an audio title.

==== Contributor ====

A Contributor is any entity that takes part in the creation and distribution of an audio recording. Examples include: artist, publisher, guitarist, vocalist, violinist, lead singer, backup singer, bassist, drummer, manager, and roadie.

* The element is identified by the class name <code>contributor</code>.
* hAudio MAY include one or more contributors.
* The contents of the element must include a valid [[hCard]] Microformat.
* The <code>role</code> field should be used to specify the Contributor's responsibility related to the audio recording.
* If multiple Contributors are specified without <code>role</code> specifications, it may be assumed that the first role mentioned is the artist.

==== Published Date ====

The Published Date specifies the date that the audio recording was made available to the public. Examples include: The airing date of a radio broadcast, the day a speech was given, or the day a music album was made available for sale.

* The element is identified by the class name <code>published-date</code>.
* hAudio MAY include one or more <code>published-date</code>s.
* The contents of the element must include a date format compliant with the [[datetime-design-pattern]].

==== Sample ====

A Sample URL specifies from where an excerpt of the audio recording may be retrieved.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>sample</code>.
* hAudio MAY include one or more URL <code>sample</code>s.
* The URL SHOULD point to a directly accessible stream or file.
* The type of the sample MAY be specified by using the <code>type</code> specifier for a URL.

==== Full Download (Enclosure) ====

An Full Download URL specifies from where the full version of an audio recording may be retrieved. The URL MUST point to a direct link to a file.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>enclosure</code>.
* hAudio MAY include one or more <code>enclosure</code> URLs.
* The type of the file MAY be specified by using the <code>type</code> specifier for a URL.

==== Purchase (Payment) ====

An Purchase URL specifies from where the full version of an audio recording may be purchased. The URL MUST point to a page that contains a purchase process.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>payment</code>.
* hAudio MAY include one or more <code>payment</code> URLs.
* The type of the file MAY be specified by using the <code>type</code> specifier for a URL.

==== Image Summary ====

An Image Summary specifies an image that should be used to summarize the audio recording. Examples include: the image of a speaker, an audio album cover image, or a picture from a concert.

* The element is identified by the class name <code>image-summary</code>.
* hAudio MAY include one or more <code>image-summary</code> images.
* The element must be an <img> element.

==== Category ====

The Category specifies the genre or style used to classify the audio recording. Examples include: blues, rock, motivational, spoken word, or sound effect.

* The element is identified by the class name <code>category</code>.
* hAudio MAY include one or more <code>category</code> elements.

==== Duration ====

The Duration specifies the length in time of the audio recording in seconds. Examples include: 104 seconds, 3:23, and 4 minutes.

* The element is identified by the class name <code>duration</code>.
* hAudio MAY include one <code>duration</code> element.
* The contents of the element SHOULD use the [[abbr-design-pattern]] whose title attribute contains an ISO-8601 formatted duration, specifically in seconds. This allows us to expand into specifying time slices and other time markup in the future, but keep parsing simple for now. An example of 3:23 (203 seconds) would be "P203S" in ISO 8601 format. Currently, all abbr attributes specifying duration SHOULD be in seconds.

==== Price ====

The Price specifies the amount of currency that must be exchanged for acquisition of a full specimen of the audio recording. Examples include: One Dollar, $2, and £4.

* The element is identified by the class name <code>price</code>.
* hAudio MAY include one or more <code>price</code> elements.
* The contents of the element SHOULD use the [[currency-proposal]].

=== More Semantic Equivalents ===

For some properties there is a more semantic equivalent, and therefore they get special treatment, e.g.:

* For any "url", use <code><a class="url" href="...">...</a></code> inside the element with the class name 'haudio' in hAudio.
* And for "image-summary", use <code><img class="image-summary" src="..." alt="Photo of ..." /></code>

==== Language ====

* To explicitly convey the natural language that an hAudio is written in, use the standard (X)HTML 'lang' attribute on the element with class="haudio", e.g. <code><div class="haudio" lang="en"> ... </div></code> If portions of an hAudio (e.g. the item name) are in a different language, use the 'lang' attribute on those portions.
* hAudio processors which need to handle the language of reviews MUST process the standard (X)HTML 'lang' attribute as specified.

=== Human vs. Machine Readable ===
If an <code><abbr></code> element is used for a property, then its '<code>title</code>' attribute is used for the value of the property, instead of the contents of the element, which can then be used to provide a user-friendly alternate presentation of the value.

Similarly, if an <code><img /></code> element is used for one or more properties, it MUST be treated as follows:

# For the "image-summary" property and any other property that takes a URL as its value, the <code>src="..."</code> attribute provides the property value.
# For other properties, the <code><img /></code> element's '<code>alt</code>' attribute is the value of the property.

=== Notes ===

This section is informative.

* By marking up audio content with the hAudio microformat, the expectation is communicated that information about the content MAY be indexed. This has no impact on the copyright of the content itself which the publisher may explicitly specify using [[rel-license]] as specified above.
* The enumerated list of item types is under development and may be extended.
* Each type may have custom hAudio fields that follow the common set.
* Additional details about a particular item should be specified with the rest of the item's info at the URL provided for the item.

== XMDP Profile ==

<pre>
<dl class="profile">
<dt>class</dt>
<dd><p>
<a rel="help" href="http://www.w3.org/TR/html401/struct/global.html#adef-class">
HTML4 definition of the 'class' attribute.</a>
This meta data profile defines some 'class' attribute values (class names)
and their meanings as suggested by a
<a href="http://www.w3.org/TR/WD-htmllink-970328#profile">
draft of "Hypertext Links in HTML"</a>.
<dl>
<dt>haudio</dt>
<dd>
Used to identify and describe metadata associated with an individual audio recording.
</dd>
<dt>audio-title</dt>
<dd>
A short textual description used to identify an audio recording among interested parties.
</dd>
<dt>collaborator</dt>
<dd>
An entity that takes part in the creation and distribution of an audio recording.
</dd>
<dt>published-date</dt>
<dd>
The date that the audio recording was made available to the public.
</dd>
<dt>image-summary</dt>
<dd>
An image that should be used to summarize the audio recording.
</dd>
<dt>category</dt>
<dd>
The genre or style used to classify the audio recording.
</dd>
<dt>duration</dt>
<dd>
The length of the audio recording.
</dd>
<dt>price</dt>
<dd>
The amount of currency that must be exchanged for acquisition of a full specimen of the audio recording.
</dd>
</dd>
</dl>
</pre>

== Examples ==
Here are a few examples of audio content from current web sites, and how they could be easily enhanced to support the hAudio audio metadata microformat.

Want to write valid [[haudio|hAudio]]? Use the [http://microformats.org/code/haudio/creator hAudio creator] (not implemented yet) to write about audio content and publish it on your blog.

=== Simple Song Example ===

Display:

Start Wearing Purple by Gogol Bordello

Microformatted XHTML:

<pre>
<div class="haudio">
<span class="audio-title">Start Wearing Purple</span> by
<div class="collaborator">
<div class="vcard">
<span class="org fn">Gogol Bordello</span>
</div>
</div>
</div>
</pre>

=== Speech Example ===

Display:

I Have a Dream, a speech by Martin Luther King Jr.

Microformatted XHTML:
<pre>
<div class="audio-title">
<span class="audio-title">I Have a Dream</span>, a
<span class="category">speech</span> by
<div class="collaborator">
<div class="vcard">
<span class="fn">Martin Luther King, Jr.</span>
</div>
</div>
</div>
</pre>

=== Complete Example ===

An example that uses every element of haudio:

[Image] Sneaking Sally Thru The Alley by Phish<br/>
Released: October 31, 2006<br/>
Acquire: Sample, Live Recording, Buy High Quality Track<br/>
Category: Live<br/>
Duration: 7 minutes, 27 seconds<br/>
Price: $0.99<br/>

Here is the hAudio Microformat markup:

<pre>
<div class="haudio">
<img class="image-summary" src="images/sneaking_sally.jpg"/>
<span class="audio-title">Sneaking Sally Thru The Alley</span>
<span class="contributor">
<span class="vcard">
<span class="fn org">Phish</span>
</span>
</span>
<br/>
Released on:
<abbr class="published-date" title="20063110">October 31, 2006<abbr>
<br/>
Acquire:
<a rel="sample" href="/samples/sneaking_sally.mp3">Sample</a>,
<a rel="enclosure" href="/live/sneaking_sally.mp3">Live Recording</a>,
<a rel="payment" href="/buy/sneaking_sally">Buy High Quality Track</a>
Category: <span class="category">live</span>
Duration: <abbr class="duration" title="447">7 minutes, 27 seconds</abbr>
Price: <span class="money">
<abbr class="currency" title="USD">$</abbr>
<span class="amount">0.99</span>
</span>
</div>
</pre>

== Examples in the wild ==

This section is '''informative'''.

== Implementations ==
This section is '''informative'''.

See [[haudio-implementations|hAudio Implementations]].

== References ==
=== Normative References ===
* [http://www.w3.org/TR/2002/REC-xhtml1-20020801/ XHTML 1.0 SE]
* [http://gmpg.org/xmdp/ XMDP]
* [[hcard|hCard]]

=== Informative References ===
* [http://www.w3.org/TR/REC-CSS1 CSS1]
* ISO.8601.1988
** International Organization for Standardization, "Data elements and interchange formats - Information interchange - Representation of dates and times", ISO Standard 8601, June 1988.
* [http://www.w3.org/TR/1998/NOTE-datetime-19980827 W3C NOTE-datetime-19980827]
* [http://www.w3.org/Consortium/Patent-Policy-20040205/ W3C Patent Policy]
* Other audio metadata efforts. See [[audio-info-formats]].

==== Similar Work ====
* [[media-info-examples]]
* [[media-info-formats]]
* [[grouping-examples]]
* [[grouping-brainstorming]]
* [[xoxo|XOXO]]

=== Copyright ===
This document and specification is distributed under a [http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 license]. It is licensed and can be used royalty-free for any purpose.

The authors intend to submit this specification to a standards body with a liberal copyright/licensing policy such as the GMPG (http://gmpg.org/), IETF (http://ietf.org/), and/or W3C (http://w3.org). Anyone wishing to contribute should read each organizations copyright principles, policies and licenses (e.g. the GMPG Principles (http://gmpg.org/principles)) and agree to them, including licensing of all contributions under all required licenses (e.g. CC-by 1.0 (http://creativecommons.org/licenses/by/1.0/) and later), before contributing.

=== Patents ===

The authors of this Microformat have not and will not apply for patents covering any invention covering this Microformat in part or as a whole. There are no claims to any patent in this document. Each author is required to report any known patent issues immediately under this section.

This document and specification is distributed under a royalty free patent policy, e.g. per the W3C Patent Policy (http://www.w3.org/Consortium/Patent-Policy-20040205/), and IETF RFC3667 (http://www.ietf.org/rfc/rfc3667.txt) & RFC3668 (http://www.ietf.org/rfc/rfc3668.txt).

=== Public Domain Release ===

The authors and editors of this page due hereby relinquish their copyright on the document and release the text of this page into the public domain.

* Manu Sporny - Signature /Manu Sporny/
* Alexandre Van de Sande
* Martin McEvoy
* [[User:DavidLehn|David Lehn]] - Signature /David Lehn/

== Work in progress ==
This specification is a work in progress. As additional aspects are discussed, understood, and written, they will be added.

== Further Reading ==

=== Mailing List Discussion ===

* Renewed interest in audio-info Microformat
** http://microformats.org/discuss/mail/microformats-new/2007-March/000028.html
** http://microformats.org/discuss/mail/microformats-new/2007-April/000096.html
* Proposed solution to split media-info into audio, video and images
** http://microformats.org/discuss/mail/microformats-new/2007-April/000143.html
* Failed proposal to re-use hReview/hAtom
** http://microformats.org/discuss/mail/microformats-new/2007-April/000138.html
* Requirement to define collections for audio-info
** http://microformats.org/discuss/mail/microformats-new/2007-April/000183.html
* First attempt at hAudio proposal
** http://microformats.org/discuss/mail/microformats-new/2007-May/000252.html
* First attempt at hAudio proposal (continued)
** http://microformats.org/discuss/mail/microformats-new/2007-May/000305.html
* hAtom is not a silver bullet
** http://microformats.org/discuss/mail/microformats-new/2007-May/000316.html
* Second attempt at hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-May/000329.html
* hAudio 'acquire' re-naming
** http://microformats.org/discuss/mail/microformats-new/2007-May/000338.html
* An argument against 'fn' in hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-May/000342.html
* hAudio Test
** http://microformats.org/discuss/mail/microformats-new/2007-May/000377.html
* hAudio - audio-album and audio-podcast
** http://microformats.org/discuss/mail/microformats-new/2007-May/000442.html
* hAudio: relevant UIDs
** http://microformats.org/discuss/mail/microformats-new/2007-June/000491.html
* Sound optimization for hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-June/000450.html
* XOXO + Playlist problem
** http://microformats.org/discuss/mail/microformats-new/2007-June/000482.html
* Reusing class names in multiple formats
** http://microformats.org/discuss/mail/microformats-new/2007-June/000525.html
* audio-title proposal for hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-June/000549.html

=== Specification Development Statistics ===

* Number of examples reviewed: 185
* Total examples analyzed: 105
* Days of development from concept to first draft: 129
* Estimated hours of work by primary investigator on hAudio: 320
* Estimated combined work hours by mailing list: 170
* Total estimated hours of work to produce hAudio draft: 490
* Estimated cost to develop based on $65,000/year salary: $16,600

==See also==
*[[audio-info-brainstorming]]
*[[audio-info-examples]]

== Related Pages ==
{{haudio-related-pages}}

User:DavidLehn

2007-07-20T21:22:47Z

DavidLehn:

irc-people

2007-06-19T17:38:56Z

DavidLehn:

A list of [[irc|IRC]] regulars sorted by nick and their normal timezones (winter/summer).

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** [http://theryanking.com/blog/archives/2006/04/19/office-hours/ Office hours]: Wednesday, 21:00 UTC
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* [[User:Stii|Stii]] (+0200 GMT)

haudio

2007-06-19T14:48:19Z

DavidLehn: s/creator/artist/

<h1>hAudio 0.6</h1>

[[haudio|hAudio]] is a simple, open, distributed format, suitable for embedding information about audio recordings in (X)HTML, Atom, RSS, and arbitrary XML. hAudio is one of several [[microformats]] open standards.

== hAudio Microformat Draft Specification ==

; Editor: [[User:ManuSporny | Manu Sporny]], [http://www.bitmunk.com/ Bitmunk] - [http://blog.digitalbazaar.com Digital Bazaar], Inc.
; Contributors: [[User:ManuSporny | Manu Sporny]], [http://www.bitmunk.com/ Bitmunk] - [http://blog.digitalbazaar.com Digital Bazaar], Inc.
: Martin McEvoy
: Alexandre Van De Sande
: Michael Johnson
: Dave Longley
: Brian Suda
: Ben Wiley Sittler
: Scott Reynen
: Frances Berriman
: James Craig
: David Janes
: Andy Mabbett
: Danny Ayers
: Rudy Desjardins
: Edward O'Connor
: Ryan King
: Chris Griego
: Brad Hafichuk
: Tantek Çelik
: Colin Barrett
: Joe Andrieu

Microformats [[#Copyright]] and [[#Patents]] statements apply.

__TOC__

== Introduction ==

It is difficult for a browser to extract semantic information about an audio recording described on a web page. Metadata such as speaker, musician, publisher, label, title of the work, release date, acquisition link, related image artwork and tags provide relevant context for the audio recording.

Having such information marked up can provide a number of benefits to the viewer. If a web browser understands that a particular web page contains a song performed by an artist, it can produce richer interactions. For example, specific searches may be performed for artists and songs via general search services such as Google and Wikipedia. Specific search services may also be queried such as MusicBrainz, The Internet Archive, FreeDB, or Bitmunk. Additionally, classification by crawlers can become more accurate. If there are 20 tracks found on a page done by the same artist, and that content consumes a significant portion of the page, it can be assumed that the page is not only about music, but also about a particular artist.

In order to enable and encourage the sharing, distribution, syndication, and aggregation of audio content, the authors propose the hAudio microformat, an open standard for distributed audio metadata. The authors have researched both numerous [[audio-info-examples]] in the wild and earlier attempts at [[audio-info-formats]], and have designed hAudio around a simple minimal schema for audio content. Feedback is encouraged on the [[haudio-feedback|hAudio feedback]] page.

=== Inspiration and Acknowledgments ===

Many thanks to the various individuals that did research and proposed ideas and discussion related to media info and audio info in general. Among the many participants are [[RodBegbie]], Dean Hudson, [http://tantek.com/log/ Tantek Çelik], [http://napsterization.org/stories/ Mary Hodder], [http://joshkinberg.com/blog/ Joshua Kinberg], ChrisMessina, and [http://onlisareinsradar.com/ Lisa Rein].

=== Scope ===

Audio content consistently share several common fields. Where possible hAudio has been based on this minimal common subset.

==== Out of scope ====

Fields that are type-specific have been omitted from hAudio. It is important that hAudio be kept simple and minimal from the start. Additional features can be added as deemed necessary by practical implementation experience.

The concept of a universal audio identifier, that is, how to identify the same audio album, song, speech, or podcast across different music and audio sites, though something very useful to have, is outside the scope of this format.

== Semantic XHTML Design Principles ==

{{semantic-xhtml-design-principles}}

== Format ==

=== In General ===
The hAudio format is based on a set of fields common to numerous audio content sites and formats in use today on the web. Where possible field names have been chosen based on those defined by the related [[hcard|hCard]] standards.

=== Schema ===

The hAudio schema consists of the following:

* hAudio ('''<code>haudio</code>''')
** '''audio-title''' required. text.
** '''contributor'''. optional. using [[hCard]].
** '''published-date'''. optional. using [[datetime-design-pattern]].
** '''rel-sample'''. optional. sample file/stream using [[rel-design-pattern]] with <code>sample</code> as the <code>mf-rel-value</code>.
** '''rel-enclosure'''. optional. full download of file using [[rel-enclosure]].
** '''rel-payment'''. optional. link to purchase process using [[rel-payment]].
** '''image-summary'''. optional. using HTML and XHTML tag <code>img</code>.
** '''category'''. optional. text.
** '''duration'''. optional. ISO-8601 time duration using [[abbr-design-pattern]] (re-used from [[hcalendar]]).
** '''price'''. optional. using [[currency-proposal]].

=== Field details ===

The fields of the hAudio schema represent the following:

==== hAudio ====

An hAudio is used to identify and describe metadata associated with an individual audio recording.

* an hAudio element is identified by class name <code>haudio</code>

==== Audio Title ====

The audio title of an audio recording is a short textual description used to identify the work among interested parties. This can be the title of a speech, song title, or short description regarding a sound effect.

* The element is identified by the class name <code>audio-title</code>.
* hAudio MUST have an audio title.

==== Contributor ====

A Contributor is any entity that takes part in the creation and distribution of an audio recording. Examples include: artist, publisher, guitarist, vocalist, violinist, lead singer, backup singer, bassist, drummer, manager, and roadie.

* The element is identified by the class name <code>contributor</code>.
* hAudio MAY include one or more contributors.
* The contents of the element must include a valid [[hCard]] Microformat.
* The <code>role</code> field should be used to specify the Contributor's responsibility related to the audio recording.
* If multiple Contributors are specified without <code>role</code> specifications, it may be assumed that the first role mentioned is the artist.

==== Published Date ====

The Published Date specifies the date that the audio recording was made available to the public. Examples include: The airing date of a radio broadcast, the day a speech was given, or the day a music album was made available for sale.

* The element is identified by the class name <code>published-date</code>.
* hAudio MAY include one or more <code>published-date</code>s.
* The contents of the element must include a date format compliant with the [[datetime-design-pattern]].

==== Sample ====

A Sample URL specifies from where an excerpt of the audio recording may be retrieved.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>sample</code>.
* hAudio MAY include one or more URL <code>sample</code>s.
* The URL SHOULD point to a directly accessible stream or file.
* The type of the sample MAY be specified by using the <code>type</code> specifier for a URL.

==== Full Download (Enclosure) ====

An Full Download URL specifies from where the full version of an audio recording may be retrieved. The URL MUST point to a direct link to a file.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>enclosure</code>.
* hAudio MAY include one or more <code>enclosure</code> URLs.
* The type of the file MAY be specified by using the <code>type</code> specifier for a URL.

==== Purchase (Payment) ====

An Purchase URL specifies from where the full version of an audio recording may be purchased. The URL MUST point to a page that contains a purchase process.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>payment</code>.
* hAudio MAY include one or more <code>payment</code> URLs.
* The type of the file MAY be specified by using the <code>type</code> specifier for a URL.

==== Image Summary ====

An Image Summary specifies an image that should be used to summarize the audio recording. Examples include: the image of a speaker, an audio album cover image, or a picture from a concert.

* The element is identified by the class name <code>image-summary</code>.
* hAudio MAY include one or more <code>image-summary</code> images.
* The element must be an <img> element.

==== Category ====

The Category specifies the genre or style used to classify the audio recording. Examples include: blues, rock, motivational, spoken word, or sound effect.

* The element is identified by the class name <code>category</code>.
* hAudio MAY include one or more <code>category</code> elements.

==== Duration ====

The Duration specifies the length in time of the audio recording in seconds. Examples include: 104 seconds, 3:23, and 4 minutes.

* The element is identified by the class name <code>duration</code>.
* hAudio MAY include one <code>duration</code> element.
* The contents of the element SHOULD use the [[abbr-design-pattern]] whose title attribute contains an ISO-8601 formatted duration, specifically in seconds. This allows us to expand into specifying time slices and other time markup in the future, but keep parsing simple for now. An example of 3:23 (203 seconds) would be "P203S" in ISO 8601 format. Currently, all abbr attributes specifying duration SHOULD be in seconds.

==== Price ====

The Price specifies the amount of currency that must be exchanged for acquisition of a full specimen of the audio recording. Examples include: One Dollar, $2, and £4.

* The element is identified by the class name <code>price</code>.
* hAudio MAY include one or more <code>price</code> elements.
* The contents of the element SHOULD use the [[currency-proposal]].

=== More Semantic Equivalents ===

For some properties there is a more semantic equivalent, and therefore they get special treatment, e.g.:

* For any "url", use <code><a class="url" href="...">...</a></code> inside the element with the class name 'haudio' in hAudio.
* And for "image-summary", use <code><img class="image-summary" src="..." alt="Photo of ..." /></code>

==== Language ====

* To explicitly convey the natural language that an hAudio is written in, use the standard (X)HTML 'lang' attribute on the element with class="haudio", e.g. <code><div class="haudio" lang="en"> ... </div></code> If portions of an hAudio (e.g. the item name) are in a different language, use the 'lang' attribute on those portions.
* hAudio processors which need to handle the language of reviews MUST process the standard (X)HTML 'lang' attribute as specified.

=== Human vs. Machine Readable ===
If an <code><abbr></code> element is used for a property, then its '<code>title</code>' attribute is used for the value of the property, instead of the contents of the element, which can then be used to provide a user-friendly alternate presentation of the value.

Similarly, if an <code><img /></code> element is used for one or more properties, it MUST be treated as follows:

# For the "image-summary" property and any other property that takes a URL as its value, the <code>src="..."</code> attribute provides the property value.
# For other properties, the <code><img /></code> element's '<code>alt</code>' attribute is the value of the property.

=== Notes ===

This section is informative.

* By marking up audio content with the hAudio microformat, the expectation is communicated that information about the content MAY be indexed. This has no impact on the copyright of the content itself which the publisher may explicitly specify using [[rel-license]] as specified above.
* The enumerated list of item types is under development and may be extended.
* Each type may have custom hAudio fields that follow the common set.
* Additional details about a particular item should be specified with the rest of the item's info at the URL provided for the item.

== XMDP Profile ==

<pre>
<dl class="profile">
<dt>class</dt>
<dd><p>
<a rel="help" href="http://www.w3.org/TR/html401/struct/global.html#adef-class">
HTML4 definition of the 'class' attribute.</a>
This meta data profile defines some 'class' attribute values (class names)
and their meanings as suggested by a
<a href="http://www.w3.org/TR/WD-htmllink-970328#profile">
draft of "Hypertext Links in HTML"</a>.
<dl>
<dt>haudio</dt>
<dd>
Used to identify and describe metadata associated with an individual audio recording.
</dd>
<dt>audio-title</dt>
<dd>
A short textual description used to identify an audio recording among interested parties.
</dd>
<dt>collaborator</dt>
<dd>
An entity that takes part in the creation and distribution of an audio recording.
</dd>
<dt>published-date</dt>
<dd>
The date that the audio recording was made available to the public.
</dd>
<dt>image-summary</dt>
<dd>
An image that should be used to summarize the audio recording.
</dd>
<dt>category</dt>
<dd>
The genre or style used to classify the audio recording.
</dd>
<dt>duration</dt>
<dd>
The length of the audio recording.
</dd>
<dt>price</dt>
<dd>
The amount of currency that must be exchanged for acquisition of a full specimen of the audio recording.
</dd>
</dd>
</dl>
</pre>

== Examples ==
Here are a few examples of audio content from current web sites, and how they could be easily enhanced to support the hAudio audio metadata microformat.

Want to write valid [[haudio|hAudio]]? Use the [http://microformats.org/code/haudio/creator hAudio creator] (not implemented yet) to write about audio content and publish it on your blog.

=== Simple Song Example ===

Display:

Start Wearing Purple by Gogol Bordello

Microformatted XHTML:

<pre>
<div class="haudio">
<span class="audio-title">Start Wearing Purple</span> by
<div class="collaborator">
<div class="vcard">
<span class="org fn">Gogol Bordello</span>
</div>
</div>
</div>
</pre>

=== Speech Example ===

Display:

I Have a Dream, a speech by Martin Luther King Jr.

Microformatted XHTML:
<pre>
<div class="audio-title">
<span class="audio-title">I Have a Dream</span>, a
<span class="category">speech</span> by
<div class="collaborator">
<div class="vcard">
<span class="fn">Martin Luther King, Jr.</span>
</div>
</div>
</div>
</pre>

=== Complete Example ===

An example that uses every element of haudio:

[Image] Sneaking Sally Thru The Alley by Phish<br/>
Released: October 31, 2006<br/>
Acquire: Sample, Live Recording, Buy High Quality Track<br/>
Category: Live<br/>
Duration: 7 minutes, 27 seconds<br/>
Price: $0.99<br/>

Here is the hAudio Microformat markup:

<pre>
<div class="haudio">
<img class="image-summary" src="images/sneaking_sally.jpg"/>
<span class="audio-title">Sneaking Sally Thru The Alley</span>
<span class="contributor">
<span class="vcard">
<span class="fn org">Phish</span>
</span>
</span>
<br/>
Released on:
<abbr class="published-date" title="20063110">October 31, 2006<abbr>
<br/>
Acquire:
<a rel="sample" href="/samples/sneaking_sally.mp3">Sample</a>,
<a rel="enclosure" href="/live/sneaking_sally.mp3">Live Recording</a>,
<a rel="payment" href="/buy/sneaking_sally">Buy High Quality Track</a>
Category: <span class="category">live</span>
Duration: <abbr class="duration" title="447">7 minutes, 27 seconds</abbr>
Price: <span class="money">
<abbr class="currency" title="USD">$</abbr>
<span class="amount">0.99</span>
</span>
</div>
</pre>

== Examples in the wild ==

This section is '''informative'''.

== Implementations ==
This section is '''informative'''.

See [[haudio-implementations|hAudio Implementations]].

== References ==
=== Normative References ===
* [http://www.w3.org/TR/2002/REC-xhtml1-20020801/ XHTML 1.0 SE]
* [http://gmpg.org/xmdp/ XMDP]
* [[hcard|hCard]]

=== Informative References ===
* [http://www.w3.org/TR/REC-CSS1 CSS1]
* ISO.8601.1988
** International Organization for Standardization, "Data elements and interchange formats - Information interchange - Representation of dates and times", ISO Standard 8601, June 1988.
* [http://www.w3.org/TR/1998/NOTE-datetime-19980827 W3C NOTE-datetime-19980827]
* [http://www.w3.org/Consortium/Patent-Policy-20040205/ W3C Patent Policy]
* Other audio metadata efforts. See [[audio-info-formats]].

==== Similar Work ====
* [[media-info-examples]]
* [[media-info-formats]]
* [[grouping-examples]]
* [[grouping-brainstorming]]
* [[xoxo|XOXO]]

=== Copyright ===
This document and specification is distributed under a [http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 license]. It is licensed and can be used royalty-free for any purpose.

The authors intend to submit this specification to a standards body with a liberal copyright/licensing policy such as the GMPG (http://gmpg.org/), IETF (http://ietf.org/), and/or W3C (http://w3.org). Anyone wishing to contribute should read each organizations copyright principles, policies and licenses (e.g. the GMPG Principles (http://gmpg.org/principles)) and agree to them, including licensing of all contributions under all required licenses (e.g. CC-by 1.0 (http://creativecommons.org/licenses/by/1.0/) and later), before contributing.

=== Patents ===

The authors of this Microformat have not and will not apply for patents covering any invention covering this Microformat in part or as a whole. There are no claims to any patent in this document. Each author is required to report any known patent issues immediately under this section.

This document and specification is distributed under a royalty free patent policy, e.g. per the W3C Patent Policy (http://www.w3.org/Consortium/Patent-Policy-20040205/), and IETF RFC3667 (http://www.ietf.org/rfc/rfc3667.txt) & RFC3668 (http://www.ietf.org/rfc/rfc3668.txt).

== Work in progress ==
This specification is a work in progress. As additional aspects are discussed, understood, and written, they will be added.

== Further Reading ==

=== Mailing List Discussion ===

* Renewed interest in audio-info Microformat
** http://microformats.org/discuss/mail/microformats-new/2007-March/000028.html
** http://microformats.org/discuss/mail/microformats-new/2007-April/000096.html
* Proposed solution to split media-info into audio, video and images
** http://microformats.org/discuss/mail/microformats-new/2007-April/000143.html
* Failed proposal to re-use hReview/hAtom
** http://microformats.org/discuss/mail/microformats-new/2007-April/000138.html
* Requirement to define collections for audio-info
** http://microformats.org/discuss/mail/microformats-new/2007-April/000183.html
* First attempt at hAudio proposal
** http://microformats.org/discuss/mail/microformats-new/2007-May/000252.html
* First attempt at hAudio proposal (continued)
** http://microformats.org/discuss/mail/microformats-new/2007-May/000305.html
* hAtom is not a silver bullet
** http://microformats.org/discuss/mail/microformats-new/2007-May/000316.html
* Second attempt at hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-May/000329.html
* hAudio 'acquire' re-naming
** http://microformats.org/discuss/mail/microformats-new/2007-May/000338.html
* An argument against 'fn' in hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-May/000342.html
* hAudio Test
** http://microformats.org/discuss/mail/microformats-new/2007-May/000377.html
* hAudio - audio-album and audio-podcast
** http://microformats.org/discuss/mail/microformats-new/2007-May/000442.html
* hAudio: relevant UIDs
** http://microformats.org/discuss/mail/microformats-new/2007-June/000491.html
* Sound optimization for hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-June/000450.html
* XOXO + Playlist problem
** http://microformats.org/discuss/mail/microformats-new/2007-June/000482.html
* Reusing class names in multiple formats
** http://microformats.org/discuss/mail/microformats-new/2007-June/000525.html
* audio-title proposal for hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-June/000549.html

=== Specification Development Statistics ===

* Number of examples reviewed: 185
* Total examples analyzed: 105
* Days of development from concept to first draft: 129
* Estimated hours of work by primary investigator on hAudio: 320
* Estimated combined work hours by mailing list: 170
* Total estimated hours of work to produce hAudio draft: 490
* Estimated cost to develop based on $65,000/year salary: $16,600

==See also==
*[[audio-info-brainstorming]]
*[[audio-info-examples]]

== Related Pages ==
{{haudio-related-pages}}

haudio

2007-06-12T23:21:00Z

DavidLehn: add close quote

<h1>hAudio 0.5</h1>

[[haudio|hAudio]] is a simple, open, distributed format, suitable for embedding information about audio recordings in (X)HTML, Atom, RSS, and arbitrary XML. hAudio is one of several [[microformats]] open standards.

== hAudio Microformat Draft Specification ==

; Editor: [[User:ManuSporny | Manu Sporny]], [http://www.bitmunk.com/ Bitmunk] - [http://blog.digitalbazaar.com Digital Bazaar], Inc.
; Contributors: [[User:ManuSporny | Manu Sporny]], [http://www.bitmunk.com/ Bitmunk] - [http://blog.digitalbazaar.com Digital Bazaar], Inc.
: Martin McEvoy
: Alexandre Van De Sande
: Michael Johnson
: Dave Longley
: Brian Suda
: Ben Wiley Sittler
: Scott Reynen
: Frances Berriman
: James Craig
: David Janes
: Andy Mabbett
: Danny Ayers
: Rudy Desjardins
: Edward O'Connor
: Ryan King
: Chris Griego
: Brad Hafichuk
: Tantek Çelik
: Colin Barrett
: Joe Andrieu

Microformats [[#Copyright]] and [[#Patents]] statements apply.

__TOC__

== Introduction ==

It is difficult for a browser to extract semantic information about an audio recording described on a web page. Metadata such as speaker, musician, publisher, label, title of the work, release date, acquisition link, related image artwork and tags provide relevant context for the audio recording.

Having such information marked up can provide a number of benefits to the viewer. If a web browser understands that a particular web page contains a song performed by an artist, it can produce richer interactions. For example, specific searches may be performed for artists and songs via general search services such as Google and Wikipedia. Specific search services may also be queried such as MusicBrainz, The Internet Archive, FreeDB, or Bitmunk. Additionally, classification by crawlers can become more accurate. If there are 20 tracks found on a page done by the same artist, and that content consumes a significant portion of the page, it can be assumed that the page is not only about music, but also about a particular artist.

In order to enable and encourage the sharing, distribution, syndication, and aggregation of audio content, the authors propose the hAudio microformat, an open standard for distributed audio metadata. The authors have researched both numerous [[audio-info-examples]] in the wild and earlier attempts at [[audio-info-formats]], and have designed hAudio around a simple minimal schema for audio content. Feedback is encouraged on the [[haudio-feedback|hAudio feedback]] page.

=== Inspiration and Acknowledgments ===

Many thanks to the various individuals that did research and proposed ideas and discussion related to media info and audio info in general. Among the many participants are [[RodBegbie]], Dean Hudson, [http://tantek.com/log/ Tantek Çelik], [http://napsterization.org/stories/ Mary Hodder], [http://joshkinberg.com/blog/ Joshua Kinberg], ChrisMessina, and [http://onlisareinsradar.com/ Lisa Rein].

=== Scope ===

Audio content consistently share several common fields. Where possible hAudio has been based on this minimal common subset.

==== Out of scope ====

Fields that are type-specific have been omitted from hAudio. It is important that hAudio be kept simple and minimal from the start. Additional features can be added as deemed necessary by practical implementation experience.

The concept of a universal audio identifier, that is, how to identify the same audio album, song, speech, or podcast across different music and audio sites, though something very useful to have, is outside the scope of this format.

== Semantic XHTML Design Principles ==

{{semantic-xhtml-design-principles}}

== Format ==

=== In General ===
The hAudio format is based on a set of fields common to numerous audio content sites and formats in use today on the web. Where possible field names have been chosen based on those defined by the related [[hcard|hCard]] standards.

=== Schema ===

The hAudio schema consists of the following:

* hAudio ('''<code>haudio</code>''')
** '''fn''' (aka formatted name). required. text (re-used from [[hcard]]).
** '''contributor'''. optional. using [[hCard]].
*** suggested ''''role''''s: speaker, artist, composer, band, publisher
** '''published-date'''. optional. using [[datetime-design-pattern]].
** '''rel-sample'''. optional. sample file/stream using [[rel-design-pattern]] with <code>sample</code> as the <code>mf-rel-value</code>.
** '''rel-enclosure'''. optional. full download of file using [[rel-enclosure]].
** '''rel-payment'''. optional. link to purchase process using [[rel-payment]].
** '''image-summary'''. optional. using HTML and XHTML tag <code>img</code>.
** '''category'''. optional. text.
** '''duration'''. optional. ISO-8601 time duration using [[abbr-design-pattern]] (re-used from [[hcalendar]]).
** '''price'''. optional. using [[currency-proposal]].

=== Field details ===

The fields of the hAudio schema represent the following:

==== hAudio ====

An hAudio is used to identify and describe metadata associated with an individual audio recording.

* an hAudio element is identified by class name <code>haudio</code>

==== Formatted Name ====

The Formatted Name of an audio recording is a short textual description used to identify the work among interested parties. This is also referred to as the title of the work. This can be the title of a speech, song title, or short description regarding a sound effect.

* The element is identified by the class name <code>fn</code>.
* hAudio MUST have a Formatted Name.

==== Contributor ====

A Contributor is any entity that takes part in the creation and distribution of an audio recording. Examples include: artist, publisher, guitarist, vocalist, violinist, lead singer, backup singer, bassist, drummer, manager, and roadie.

* The element is identified by the class name <code>contributor</code>.
* hAudio MAY include one or more contributors.
* The contents of the element must include a valid [[hCard]] Microformat.
* The <code>role</code> field should be used to specify the Contributor's responsibility related to the audio recording.
* If multiple Contributors are specified without <code>role</code> specifications, it may be assumed that the first role mentioned is the creator.

==== Published Date ====

The Published Date specifies the date that the audio recording was made available to the public. Examples include: The airing date of a radio broadcast, the day a speech was given, or the day a music album was made available for sale.

* The element is identified by the class name <code>published-date</code>.
* hAudio MAY include one or more <code>published-date</code>s.
* The contents of the element must include a date format compliant with the [[datetime-design-pattern]].

==== Sample ====

A Sample URL specifies from where an excerpt of the audio recording may be retrieved.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>sample</code>.
* hAudio MAY include one or more URL <code>sample</code>s.
* The URL SHOULD point to a directly accessible stream or file.
* The type of the sample MAY be specified by using the <code>type</code> specifier for a URL.

==== Full Download (Enclosure) ====

An Full Download URL specifies from where the full version of an audio recording may be retrieved. The URL MUST point to a direct link to a file.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>enclosure</code>.
* hAudio MAY include one or more <code>enclosure</code> URLs.
* The type of the file MAY be specified by using the <code>type</code> specifier for a URL.

==== Purchase (Payment) ====

An Purchase URL specifies from where the full version of an audio recording may be purchased. The URL MUST point to a page that contains a purchase process.

* The element is identified by a URL fitting the [[rel-design-pattern]], the rel content being <code>payment</code>.
* hAudio MAY include one or more <code>payment</code> URLs.
* The type of the file MAY be specified by using the <code>type</code> specifier for a URL.

==== Image Summary ====

An Image Summary specifies an image that should be used to summarize the audio recording. Examples include: the image of a speaker, an audio album cover image, or a picture from a concert.

* The element is identified by the class name <code>image-summary</code>.
* hAudio MAY include one or more <code>image-summary</code> images.
* The element must be an <img> element.

==== Category ====

The Category specifies the genre or style used to classify the audio recording. Examples include: blues, rock, motivational, spoken word, or sound effect.

* The element is identified by the class name <code>genre</code>.
* hAudio MAY include one or more <code>genre</code>s.

==== Duration ====

The Duration specifies the length in time of the audio recording in seconds. Examples include: 104 seconds, 3:23, and 4 minutes.

* The element is identified by the class name <code>duration</code>.
* hAudio MAY include one <code>duration</code> element.
* The contents of the element SHOULD use the [[abbr-design-pattern]] whose title attribute contains an ISO-8601 formatted duration, specifically in seconds. This allows us to expand into specifying time slices and other time markup in the future, but keep parsing simple for now. An example of 3:23 (203 seconds) would be "P203S" in ISO 8601 format. Currently, all abbr attributes specifying duration SHOULD be in seconds.

==== Price ====

The Price specifies the amount of currency that must be exchanged for acquisition of a full specimen of the audio recording. Examples include: One Dollar, $2, and £4.

* The element is identified by the class name <code>price</code>.
* hAudio MAY include one or more <code>price</code> elements.
* The contents of the element SHOULD use the [[currency-proposal]].

=== More Semantic Equivalents ===

For some properties there is a more semantic equivalent, and therefore they get special treatment, e.g.:

* For any "url", use <code><a class="url" href="...">...</a></code> inside the element with the class name 'haudio' in hAudio.
* And for "image-summary", use <code><img class="image-summary" src="..." alt="Photo of ..." /></code>

==== Language ====

* To explicitly convey the natural language that an hAudio is written in, use the standard (X)HTML 'lang' attribute on the element with class="haudio", e.g. <code><div class="haudio" lang="en"> ... </div></code> If portions of an hAudio (e.g. the item name) are in a different language, use the 'lang' attribute on those portions.
* hAudio processors which need to handle the language of reviews MUST process the standard (X)HTML 'lang' attribute as specified.

=== Human vs. Machine Readable ===
If an <code><abbr></code> element is used for a property, then its '<code>title</code>' attribute is used for the value of the property, instead of the contents of the element, which can then be used to provide a user-friendly alternate presentation of the value.

Similarly, if an <code><img /></code> element is used for one or more properties, it MUST be treated as follows:

# For the "image-summary" property and any other property that takes a URL as its value, the <code>src="..."</code> attribute provides the property value.
# For other properties, the <code><img /></code> element's '<code>alt</code>' attribute is the value of the property.

=== Notes ===

This section is informative.

* By marking up audio content with the hAudio microformat, the expectation is communicated that information about the content MAY be indexed. This has no impact on the copyright of the content itself which the publisher may explicitly specify using [[rel-license]] as specified above.
* The enumerated list of item types is under development and may be extended.
* Each type may have custom hAudio fields that follow the common set.
* Additional details about a particular item should be specified with the rest of the item's info at the URL provided for the item.

== XMDP Profile ==

<pre>
<dl class="profile">
<dt>class</dt>
<dd><p>
<a rel="help" href="http://www.w3.org/TR/html401/struct/global.html#adef-class">
HTML4 definition of the 'class' attribute.</a>
This meta data profile defines some 'class' attribute values (class names)
and their meanings as suggested by a
<a href="http://www.w3.org/TR/WD-htmllink-970328#profile">
draft of "Hypertext Links in HTML"</a>.
<dl>
<dt>haudio</dt>
<dd>
Used to identify and describe metadata associated with an individual audio recording.
</dd>
<dt>fn</dt>
<dd>
A short textual description used to identify an audio recording among interested parties.
</dd>
<dt>collaborator</dt>
<dd>
An entity that takes part in the creation and distribution of an audio recording.
</dd>
<dt>published-date</dt>
<dd>
The date that the audio recording was made available to the public.
</dd>
<dt>image-summary</dt>
<dd>
An image that should be used to summarize the audio recording.
</dd>
<dt>category</dt>
<dd>
The genre or style used to classify the audio recording.
</dd>
<dt>duration</dt>
<dd>
The length of the audio recording.
</dd>
<dt>price</dt>
<dd>
The amount of currency that must be exchanged for acquisition of a full specimen of the audio recording.
</dd>
</dd>
</dl>
</pre>

== Examples ==
Here are a few examples of audio content from current web sites, and how they could be easily enhanced to support the hAudio audio metadata microformat.

Want to write valid [[haudio|hAudio]]? Use the [http://microformats.org/code/haudio/creator hAudio creator] (not implemented yet) to write about audio content and publish it on your blog.

=== Simple Song Example ===

Display:

Start Wearing Purple by Gogol Bordello

Microformatted XHTML:

<pre>
<div class="haudio">
<span class="fn">Start Wearing Purple</span> by
<div class="collaborator">
<div class="vcard">
<span class="org fn">Gogol Bordello</span>
</div>
</div>
</div>
</pre>

=== Speech Example ===

Display:

I Have a Dream, a speech by Martin Luther King Jr.

Microformatted XHTML:
<pre>
<div class="haudio">
<span class="fn">I Have a Dream</span>, a
<span class="category">speech</span> by
<div class="collaborator">
<div class="vcard">
<span class="fn">Martin Luther King, Jr.</span>
</div>
</div>
</div>
</pre>

=== Complete Example ===

An example that uses every element of haudio:

[Image] Sneaking Sally Thru The Alley by Phish<br/>
Released: October 31, 2006<br/>
Acquire: Sample, Live Recording, Buy High Quality Track<br/>
Category: Live<br/>
Duration: 7 minutes, 27 seconds<br/>
Price: $0.99<br/>

Here is the hAudio Microformat markup:

<pre>
<div class="haudio">
<img class="image-summary" src="images/sneaking_sally.jpg"/>
<span class="fn">Sneaking Sally Thru The Alley</span>
<span class="contributor">
<span class="vcard">
<span class="fn org">Phish</span>
</span>
</span>
<br/>
Released on:
<abbr class="published-date" title="20063110">October 31, 2006<abbr>
<br/>
Acquire:
<a rel="sample" href="/samples/sneaking_sally.mp3">Sample</a>,
<a rel="enclosure" href="/live/sneaking_sally.mp3">Live Recording</a>,
<a rel="payment" href="/buy/sneaking_sally">Buy High Quality Track</a>
Category: <span class="category">live</span>
Duration: <abbr class="duration" title="447">7 minutes, 27 seconds</abbr>
Price: <span class="money">
<abbr class="currency" title="USD">$</abbr>
<span class="amount">0.99</span>
</span>
</div>
</pre>

== Examples in the wild ==

This section is '''informative'''.

== Implementations ==
This section is '''informative'''.

See [[haudio-implementations|hAudio Implementations]].

== References ==
=== Normative References ===
* [http://www.w3.org/TR/2002/REC-xhtml1-20020801/ XHTML 1.0 SE]
* [http://gmpg.org/xmdp/ XMDP]
* [[hcard|hCard]]

=== Informative References ===
* [http://www.w3.org/TR/REC-CSS1 CSS1]
* ISO.8601.1988
** International Organization for Standardization, "Data elements and interchange formats - Information interchange - Representation of dates and times", ISO Standard 8601, June 1988.
* [http://www.w3.org/TR/1998/NOTE-datetime-19980827 W3C NOTE-datetime-19980827]
* [http://www.w3.org/Consortium/Patent-Policy-20040205/ W3C Patent Policy]
* Other audio metadata efforts. See [[audio-info-formats]].

==== Similar Work ====
* [[media-info-examples]]
* [[media-info-formats]]
* [[grouping-examples]]
* [[grouping-brainstorming]]
* [[xoxo|XOXO]]

=== Copyright ===
This document and specification is distributed under a [http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 license]. It is licensed and can be used royalty-free for any purpose.

The authors intend to submit this specification to a standards body with a liberal copyright/licensing policy such as the GMPG (http://gmpg.org/), IETF (http://ietf.org/), and/or W3C (http://w3.org). Anyone wishing to contribute should read each organizations copyright principles, policies and licenses (e.g. the GMPG Principles (http://gmpg.org/principles)) and agree to them, including licensing of all contributions under all required licenses (e.g. CC-by 1.0 (http://creativecommons.org/licenses/by/1.0/) and later), before contributing.

=== Patents ===

The authors of this Microformat have not and will not apply for patents covering any invention covering this Microformat in part or as a whole. There are no claims to any patent in this document. Each author is required to report any known patent issues immediately under this section.

This document and specification is distributed under a royalty free patent policy, e.g. per the W3C Patent Policy (http://www.w3.org/Consortium/Patent-Policy-20040205/), and IETF RFC3667 (http://www.ietf.org/rfc/rfc3667.txt) & RFC3668 (http://www.ietf.org/rfc/rfc3668.txt).

== Work in progress ==
This specification is a work in progress. As additional aspects are discussed, understood, and written, they will be added.

== Further Reading ==

=== Mailing List Discussion ===

* Renewed interest in audio-info Microformat
** http://microformats.org/discuss/mail/microformats-new/2007-March/000028.html
** http://microformats.org/discuss/mail/microformats-new/2007-April/000096.html
* Proposed solution to split media-info into audio, video and images
** http://microformats.org/discuss/mail/microformats-new/2007-April/000143.html
* Failed proposal to re-use hReview/hAtom
** http://microformats.org/discuss/mail/microformats-new/2007-April/000138.html
* Requirement to define collections for audio-info
** http://microformats.org/discuss/mail/microformats-new/2007-April/000183.html
* First attempt at hAudio proposal
** http://microformats.org/discuss/mail/microformats-new/2007-May/000252.html
* First attempt at hAudio proposal (continued)
** http://microformats.org/discuss/mail/microformats-new/2007-May/000305.html
* hAtom is not a silver bullet
** http://microformats.org/discuss/mail/microformats-new/2007-May/000316.html
* Second attempt at hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-May/000329.html
* hAudio 'acquire' re-naming
** http://microformats.org/discuss/mail/microformats-new/2007-May/000338.html
* An argument against 'fn' in hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-May/000342.html
* hAudio Test
** http://microformats.org/discuss/mail/microformats-new/2007-May/000377.html
* hAudio - audio-album and audio-podcast
** http://microformats.org/discuss/mail/microformats-new/2007-May/000442.html
* hAudio: relevant UIDs
** http://microformats.org/discuss/mail/microformats-new/2007-June/000491.html
* Sound optimization for hAudio
** http://microformats.org/discuss/mail/microformats-new/2007-June/000450.html
* XOXO + Playlist problem
** http://microformats.org/discuss/mail/microformats-new/2007-June/000482.html

==See also==
*[[audio-info-brainstorming]]
*[[audio-info-examples]]

== Related Pages ==
{{haudio-related-pages}}