blog-post-brainstorming: Difference between revisions
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This roughly corresponds to <code>atom:content</code> and/or <code>atom:summary</code> elements. See [[blog-post-examples#Entry_Content]] for the various forms seen in the wild. | This roughly corresponds to <code>atom:content</code> and/or <code>atom:summary</code> elements. See [[blog-post-examples#Entry_Content]] for the various forms seen in the wild. | ||
=== | === Discussion: the split content problem === | ||
The last item above (content broken into multiple sections) introduces a few unique problems. It is not sufficient to enclose all the different content sections in a <code>atom:content</code> element, as the following example illustrates: | The last item above (content broken into multiple sections) introduces a few unique problems. It is not sufficient to enclose all the different content sections in a <code>atom:content</code> element, as the following example illustrates: |
Revision as of 12:34, 20 October 2005
Discussion Participants
Editors
Authors
Contributors
Purpose
The 'blog-post-microformat' proposes a codification of how blog posts are indentifies within weblogs. It is hoped that this should be considered to be 'expansive': for example, the proposal could be used on CNN.com to mark up news articles and summary pages.
Terminology
This section explores the terminology that should used to discuss a blog post microformat. To make it easier to talk about the various different types of teminology, We're using a XML-like namespace version so we can make statements like atom:entry
is roughly equivalent to rss20:feed
, atom:feed/atom:link@relalternate
is roughly equivalent to rss20:channel/rss20:link
or atom:author
is not equivalent to rss:entry/rss:author
(because RSS 2.0 is only the definition of an email address).
Common terminology in weblogs
Reviewing blog-post-formats#Tools, one can see that there's little standardization amongst tools or even within a individual tool (such as 'blogger') for names of elements of blog posts. There are however many common elements, including:
- a container for all posts/entries
- a container for individual posts
- the post content, which can be complete, summarized with a link to the complete link, or a couple of paragraphs with javascript/CSS tricks to reveal the remainder of the content
- the name of the author
- the posting date (in many many formats)
Although this looks like a bit of a dog's breakfast, there is usually a fair amount of rigour behind the presentation, as Atom and/or RSS feeds can be produced also from the same tools.
Furthermore, in developing a microformat for weblog posts, we want to be careful not to break any (or many) templates. Note that many weblog templates will have to be updated as they produce somewhat crufty HTML rather than shiny XHTML.
Atom Terminology
See here for the spec and blog-post-formats#Atom for analysis.
atom:feed
- (composite) a collection of entries plus information about thematom:author
- (composite) the author of a feed (may contain atom:email, atom:name, atom:uri)atom:id
- a permament identifier for a feedatom:title
- the title of an atom:entry or a atom:feedatom:updated
- the last time the feed was updatedatom:link@relalternate
- the home page of a feedatom:link@relself
- the URI of the feed (where it can be downloaded)atom:entry
- (composite) an entry within the feedatom:content
- the feed's contentatom:summary
- a summary of the feed's contentatom:entry/link
- the permament URI of the entryatom:published
- the time of the initial creation or first availability of the entry
RSS Terminology
See here for the spec and blog-post-formats#RSS for analysis. There are a lot more elements in RSS but this covers the most commonly used ones.
rss2:channel
- (composite) a collection of entries plus information about themrss2:author
- (composite) the author of a feed (may contain atom:email, atom:name, atom:uri)rss2:link
- The URL to the HTML website corresponding to the channel (compare to atom:link@relalternate)rss2:title
- the title of an rss2:channel or a rss2:itemrss2:pubDate
- The publication date for the content in the channel.rss2:item
- (composite) an entry within the feedrss2:item/link
- The URL of the item. Note that this may not be a permalink for the item; it may be a link to some other page on the Internet that the rss2:item is aboutrss2:description
- The item synopsis [sic]. There is no special indication whether this is the full content of an entry, a summary, or a precis of what the rss2:item/link is pointing torss2:author
- email address of the author of the item
Recommendation
Atom has a much more precise mechanism for defining syndication feeds and weblog data. A mechanical transformation from Atom -> RSS will always lead to a correct RSS feed; a RSS -> Atom translation would have to make a decision amongst multiple definitions that may not always be correct. For example, the format of markup, the role of an author, or the meaning of a link.
IMPORTANT: we shall talk about things such as 'marking elements atom:feed
'; consider this a purely conceptual thing. The text 'atom:feed' will not appear in the XHTML microformat -- we may decide later to use the actual phrase 'atom_feed', 'feed', 'items' or 'googlybear'. In the case where there is no clear or applicable atom terminology, we shall use 'weblog:xxx'.
Discovered Elements
This section explores the information discovered from blog-post-formats using the terminology discussed above. We will only focus on the major elements of weblog posts:
- the EntryGroup
- the individual Entry
- the Entry Title
- the Entry Content
- the Entry Permalink
- the Entry Datetimes
For now, the codification of the following major elements will be deferred as there is/may be overlap with other microformats that should be explored further
- the EntryGroup Title
- the EntryGroup Permalink
- the Entry Poster/Author - in particular, should hcard be used?
Further input from the community would be appreciated here
EntryGroup
Roughly speaking, this corresponds to 'atom:feed' or 'rss2:channel' (in particular, the items within those XML elements). See blog-post-examples#EntryGroup for the various forms seen in the wild.
Microformat Recommendation
- weblog pages (including home pages, archives, category pages, tag pages and so forth) that may container multiple entries MUST enclose the entries in a
atom:feed
element - weblog pages MAY have multiple
atom:feed
element enclosing different groups of entries atom:feed
elements MUST NOT be nested- weblog pages that have exactly on entry MAY use the
atom:feed
Example Transformation
Note that the string 'atom:feed' is a placeholder for something to be decided later.
Original (obviously, if there is no existing EntryGroup block element, one can be added):
<div id="content"> <h2 id="home-title"> Latest microformats news <a href="http://www.microformats.org/feed/" title="link to RSS feed" id="feed-link"> <img src="/img/xml.gif" width="23" height="13" alt="XML" /> </a> </h2> <div class="entry"> <h3 id="post-60"> <a href="http://www.microformats.org/blog/2005/...">Wiki Attack</a> </h3> ... </div> ... </div>
Transformed:
<div id="content" class="atom:feed"> <h2 id="home-title"> Latest microformats news <a href="http://www.microformats.org/feed/" title="link to RSS feed" id="feed-link"> <img src="/img/xml.gif" width="23" height="13" alt="XML" /> </a> </h2> <div class="entry"> <h3 id="post-60"> <a href="http://www.microformats.org/blog/2005/...">Wiki Attack</a> </h3> ... </div> ... </div>
Individual Entry
This corresponds almost exactly to the atom:entry
or rss2:item
elements. See blog-post-examples#Individual_Entry for the various forms seen in the wild.
Microformat Recommendation
- weblog entries MUST be enclosed in a single
atom:entry
element atom:entry
elements MUST NOT be nestedatom:entry
MUST NOT not belong to more than oneatom:feed
element
Example Transformation
Note that the string 'atom:entry' is a placeholder for something to be decided later.
Entries in existing block
Original:
<div class="entry"> <h3 id="post-60"> <a href="http://www.microformats.org/blog/2005/...">Wiki Attack</a> </h3> ... rest of entry ... </div>
Transformed:
<div class="atom:feed"> <div class="atom:entry entry"> <h3 id="post-60"> <a href="http://www.microformats.org/blog/2005/...">Wiki Attack</a> </h3> ... rest of entry ... </div> ... additional entries ... </div>
Entries not in an existing block
Original:
<a name="112877372228959075"> </a> <br> <strong>Just one problem, Minister.</strong> Last week, Bill Rammell, <br>
Transformed:
<div class="atom:feed"> <div class="atom:entry" id="112877372228959075"> <br /> <strong>Just one problem, Minister.</strong> Last week, Bill Rammell, <br /> ... rest of entry ... </div> ... additional entries ... </div>
Note the additional changes were also made:
<br>
was made XHTML compliant<a name="...">
was converted to aid="..."
(confirm this is OK)
Disjointed entries
Ignore any existing blocks and treat as the previous case of no block.
Entry Title
This corresponds almost exactly to the atom:title
or rss2:title
elements. See blog-post-formats#Titles for examples from which we see that there are two fundemental ways titles are used in the wild: at the block level and inline. Our proposal must be capable of handling both forms.
Microformat Recommendation
atom:entry
s SHOULD have at most 1 title- block level titles SHOULD be represented using
<h#>
, the first such element for in aatom:entry
being considered to be the title; this need not be marked up or identified in any other way as the title - inline titles MUST be marked as
atom:title
; it is also possible to do this using block level formatting such as<div>
, but this is discouraged
Discussion: why not always <h#>
?
Using CSS display: inline
, block level elements can be converted to inline elements. Unfortunately, we cannot nest <h#>
inside of a <p>
block to achieve the correct effect. I.e. we cannot convert ...
<p><strong>The Title</strong>: The Text...</p>
... into ...
<p><h3 style="display: inline">The Title</h3>: The Text ...</p>
... because the XHTML will not validate. Also...
<h3 style="display: inline">The Title</h3><p>: The Text ...</p>
... will not work because presentation effect will be different than what the user intends (because the <p>
will introduce a line break).
Example Transformation
Note that the string 'atom:title' is a placeholder for something to be decided later.
Header in <h#>
block
Original (and Final):
<div class="atom:entry"> <h2 id="post-59">Web Essentials Audio</h2> ... reset of entry ... </div>
No transformation is needed -- the blog-post microformat will recognize this as the atom:title
.
Header in other block element
Original:
<div class="atom:entry"> <div class"header">Web Essentials Audio</div> </div>
Transformed (the header level is to taste):
<div class="atom:entry"> <h3>Web Essentials Audio</h3> </div>
It is possible to add class"atom:title"
to the div
but we recommend against it. However, we recognize rgar there may be certain BB Tools that making this change may be too difficult.
Header in inline element
Original:
<div class="atom:entry" id="112877372228959075"> <br /> <strong>Just one problem, Minister.</strong> Last week, Bill Rammell, <br /> ... rest of entry ... </div>
Transformed:
<div class="atom:entry" id="112877372228959075"> <br /> <strong class="atom:title">Just one problem, Minister.</strong> Last week, Bill Rammell, <br /> ... rest of entry ... </div>
Entry Content
This roughly corresponds to atom:content
and/or atom:summary
elements. See blog-post-examples#Entry_Content for the various forms seen in the wild.
Discussion: the split content problem
The last item above (content broken into multiple sections) introduces a few unique problems. It is not sufficient to enclose all the different content sections in a atom:content
element, as the following example illustrates:
<div class="atom:entry"> <div class="atom:content"> ... first part of the content ... "Read More" ... second part of the content ... </div> </div>
"Read More" is not part of the content! Therefore, we propose that multiple content sections be allowed in a single atom:entry
. The concatenation of all these content blocks will define the complete content:
<div class="atom:entry"> <div class="atom:content"> ... first part of the content ... </div> "Read More" <div class="atom:content"> ... second part of the content ... </div> </div>
The same argument is applicable to atom:summary
.
Microformat Recommendation
- an
atom:entry
MAY have zero or moreatom:summary
sections. There is no requirement that different representations of the same entry (on different URIs) use the same summaries. - an
atom:entry
MAY have zero or moreatom:content
sections. The serial concatenation of all theatom:content
sections within the entry MUST represent the complete content of the entry. Note that the rule here is slightly different than Atom which only allows oneatom:content
.
Example Transformation
Note that the strings 'atom:summary' and 'atom:content' (etc.) are placeholders for something to be decided later.
Entry with summary content
Original:
<div class="inlineBlog"> <h3 id="a003068"> <a href="http://thecommunityengine.com/h.../xfolk_vegomatic.html" class="taggedlink">xFolk Veg-o-matic Alpha</a> </h3> <p class="abstract extended"> We provide a way to surf the web and slice and dice information you find there into your own custom output stream. </p> ... some tag and category stuff ... <p> The folks at ... the rest of the content </p> <p class="extended"> <a href="http://thecommunityengine.com/.../xfolk_vegomatic.html#more">Continue reading "xFolk Veg-o-matic Alpha"</a> </p> ... </div>
Transformation:
<div class="inlineBlog atom:entry"> <h3 id="a003068"> <a href="http://thecommunityengine.com/h.../xfolk_vegomatic.html" class="taggedlink atom:permalink">xFolk Veg-o-matic Alpha</a> </h3> <p class="abstract extended"> We provide a way to surf the web and slice and dice information you find there into your own custom output stream. </p> ... some tag and category stuff ... <div class="atom:summary"> <p> The folks at ... the rest of the content </p> </div> <p class="extended"> <a href="http://thecommunityengine.com/.../xfolk_vegomatic.html#more">Continue reading "xFolk Veg-o-matic Alpha"</a> </p> ... </div>
Notes:
- we didn't do anything with the "abstract" section -- this is a discussion for another day
- we didn't include the tag stuff in the summary, and probably wouldn't if this was the complete content
Entry with complete content
Original:
Transformation:
Entry with split content (multiple sections)
Original:
<div class="blogbody"> <a name="008148"></a> <div class="title"> Face to face: why places will continue to exist </div> <div class="posted"> <strong>Brian Micklethwait (London)</strong> <a href="...">Science & Technology</a> </div> <p>It is not just that I dislike filling in forms....</p> ... the first section of the content ... ... this link makes the extended section show ... <span id="varP8148"> <img src="http://www.samizdata.net/blog/img/bullet_tri.gif" width="16" height="10" alt="" /> <a href="..." onclick="showMore(8148,'...');return false;"> Read more. </a> </span> <div id="varXYZ8148" style="display: none"> <p>The very gadgets – computers linked...</p> ... the rest of the extended content ... ... this link makes the extended section hide ... <img src="..." width="16" height="10" alt="" /> <a href="#008148" onclick="showMore(8148,0);return true;"> Read less. </a> </div> </div> </div>
Transformation:
<div class="blogbody atom:entry" id="008148"> <h3> Face to face: why places will continue to exist </h3> <div class="posted"> <strong>Brian Micklethwait (London)</strong> <a href="...">Science & Technology</a> </div> <div class="atom:content"> <p>It is not just that I dislike filling in forms....</p> ... the first section of the content ... </div> ... this link makes the extended section show ... <span id="varP8148"> <img src="http://www.samizdata.net/blog/img/bullet_tri.gif" width="16" height="10" alt="" /> <a href="..." onclick="showMore(8148,'...');return false;"> Read more. </a> </span> <div id="varXYZ8148" style="display: none"> <div class="atom:content"> <p>The very gadgets – computers linked...</p> ... the rest of the extended content ... </div> ... this link makes the extended section hide ... <img src="..." width="16" height="10" alt="" /> <a href="#008148" onclick="showMore(8148,0);return true;"> Read less. </a> </div> </div> </div>
Note:
atom:content
div
s were created for each the of the text sections, so that non-content coded would not be incorrectly marked- there are two
atom:content
sections; together they make the complete content - the conversion of
<div class="header">
to<h3>
- the addition of
atom:entry
as needed - the removal of the
<a name="008148">
in favor of placing anid
on theatom:entry
- further manipulation of the author could be done
- further manipulation of the category could be done
Entry Permalink
Permalinks roughly correspond to atom:link
. See blog-post-examples#Entry_Permalinks for examples.
A permalink is called canonical if it is the best representation of the URI for that entry; the definition of what 'best representation' is is entirely at the discretion of the weblog's publisher. We recommend that weblogs use canonical URIs because it allows "threading" together multiple posts and sources with byte-level comparisons. In general, the canonical URI should be the link used in an Atom entry.
Microformat Recommendation
- an Entry MUST NOT have more than one permalink marked as
atom:link
- permalinks SHOULD be absolute URIs
- permalinks SHOULD be canonical
- permalinks SHOULD be the same as the
atom:link
used in syndication feeds
Example Transformations
Original:
<div class="entry"> <h3 id="post-45"> <a href="http://www.microformats.org/blog/2005/08/21/foobar-microformats/" rel="bookmark" title="Permanent Link to FooBar Microformats">FooBar Microformats</a> </h3> ... </div>
Transformation:
<div class="atom:entry entry"> <h3 id="post-45"> <a href="http://www.microformats.org/blog/2005/08/21/foobar-microformats/" rel="atom:link bookmark" title="Permanent Link to FooBar Microformats">FooBar Microformats</a> </h3> ... </div>
Original:
<h3>YET ANOTHER INSTANCE OF THE WORLD FINALLY CATCHING UP TO THE BLOG</h3> <p>Today's news: Neuticles win ... award.</p> <p class="posted"> Posted by judi on October 7, 2005 at 05:00 PM | <a href="http://blogs.herald.com/dave_barrys_blog/2005/10/yet_another_ins.html">Permalink</a> </p>
Transformation:
<div class="atom:entry"> <h3>YET ANOTHER INSTANCE OF THE WORLD FINALLY CATCHING UP TO THE BLOG</h3> <p>Today's news: Neuticles win ... award.</p> <p class="posted"> Posted by judi on October 7, 2005 at 05:00 PM | <a rel="atom:link" href="http://blogs.herald.com/dave_barrys_blog/2005/10/yet_another_ins.html">Permalink</a> </p>
Entry Datetimes - Creation and Modified
Weblogs typically display (in HTML) the creation time of their posts (roughly but not exactly corresponding to atom:published
) and not so much the last modified time (atom:updated
).
Also see datetime-design-pattern for more information on specifying datetimes. The recommendation here is styled after datetimes in hcalendar.
Forms seen in the wild
See blog-post-formats#Datetimes
Microformat Recommendation
- date headers between weblog entries are outside of this microformat
atom:published
SHOULD be indicated by anabbr
element around the human readable version of the date or datetime.- the 'class' attribute MUST indicate
atom:published
- the 'title' attribute MUST be a complete datetime, in the format of datetime-design-pattern
- the 'class' attribute MUST indicate
- likewise for
atom:updated
, if present
Example transformation
Note that the string 'atom:published' is a placeholder for something to be decided later.
Original:
<a href"...">Friday, September 30th, 2005 at 12:31 pm</a>
Transformed:
<a href"..."><abbr class"atom:published" title"200050930T12:31:01-0500">Friday, September 30th, 2005 at 12:31 pm</abbr></a>
Possible Uses
This section describes potential applications for a blog post microformat
Transformational Uses
By transformational, we mean feeding a weblog post to some sort of transformation tool (such as XSLT) to produce a different version of the post fit for a different use.
Printing Weblog Posts
Reblogging
Archival Uses
By 'archival', we mean taking weblog entries and placing them in a database for later analysis, searching, aggregation and so forth.
Personal Database
Search Engines
Obstacles
Header Tag for Entry Title?
--Bryan 14:55, 14 Aug 2005 (PDT)
Many weblog CMSes allow for concurrent publishing of entries in the following ways:
- multiple entries on a page (an "Index," monthly archive, category archive, etc. see Example)
- one entry on a page (see Example)
Early attempts at blog-post-formats have set the title of the blog post to use the h3 tag.
At least where individual entry pages are concerned (and possible including indexes and archives), I recommend using h1 for the entry title, given that the entry is by far the most important chunk of information on the page, and it's what we'd want search engines to recognize as such. In the case where the h1 was used for the site title, fears about "losing" this information should be allayed by simply including the site name in the title tag, after the title of the article / entry / post.
- Whether an h3 or h1 is used is irrelevant, the semantics will be applied with classnames. This is a non-issue. --RyanKing 22:35, 18 Aug 2005 (PDT)
See Also
- blog-post-formats - many examples taken from the real world about how blog content is marked up
- blog-post - coming soon; a proposal for a microformat
- blog-description-format - how to describe a blog (as opposed to the individual entries, which is what we're doing here)
- Blog Post Microformat Proposal Some thoughts on the topic with useful illustrations.
- Danny Ayers proposes the name hAtom and some applications
- Elias Torres says we need 'hAtom'