https://microformats.org/wiki/api.php?action=feedcontributions&user=TMsk&feedformat=atomMicroformats Wiki - User contributions [en]2024-03-28T23:45:21ZUser contributionsMediaWiki 1.38.4https://microformats.org/wiki/index.php?title=hcalendar&diff=6006hcalendar2006-04-19T02:26:38Z<p>TMsk: /* Desktop Authoring Tools */</p>
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<div><h1> hCalendar </h1><br />
<br />
hCalendar is a simple, open, distributed calendaring and events format, based on the iCalendar standard ([http://www.ietf.org/rfc/rfc2445.txt RFC2445]), suitable for embedding in (X)HTML, Atom, RSS, and arbitrary XML. hCalendar is one of several open [[microformats|microformat]] standards.<br />
<br />
Want to get started with writing an [[hcalendar|hCalendar]] event? Use the [http://microformats.org/code/hcalendar/creator hCalendar creator] to write up an event and publish it.<br />
<br />
<br />
__TOC__<br />
<br />
== Draft Specification ==<br />
<br />
; Editor : [http://tantek.com/ Tantek Çelik] ([http://technorati.com Technorati, Inc])<br />
; Authors : [http://tantek.com/ Tantek Çelik], [http://technorati.com Technorati, Inc]<br />
: [http://suda.co.uk/ Brian Suda]<br />
<br />
=== Copyright ===<br />
{{MicroFormatCopyrightStatement2004}}<br />
<br />
=== Patents ===<br />
{{MicroFormatPatentStatement}}<br />
<br />
=== Inspiration and Acknowledgments ===<br />
Thanks to:<br />
* Adam Bosworth for leading the [http://wiki.oreillynet.com/foocamp04/index.cgi?HTMLForCalendars FOO Camp 2004 HTML For Calendars presentation] which brought together a critical mass of interested parties.<br />
<br />
<br />
<br />
== Introduction ==<br />
The iCalendar standard ([http://www.ietf.org/rfc/rfc2445.txt RFC2445]), has been broadly interoperably implemented (e.g. Apple's "iCal" application built into MacOSX).<br />
<br />
In addition, bloggers often discuss events on their blogs -- upcoming events, writeups of past events, etc. With just a tad bit of structure, bloggers can discuss events in their blog(s) in such a way that spiders and other aggregators can retrieve such events, automatically convert them to iCalendar, and use them in any iCalendar application or service.<br />
<br />
This specification introduces the '''hCalendar''' format, which is a 1:1 representation of the aforementioned iCalendar standard, in semantic XHTML. Bloggers can both embed hCalendar events directly in their web pages, and style them with CSS to make them appear as desired. In addition, hCalendar enables applications to retrieve information about such events directly from web pages without having to reference a separate file.<br />
<br />
== Semantic XHTML Design Principles ==<br />
<br />
{{semantic-xhtml-design-principles}}<br />
<br />
== Format ==<br />
<br />
=== In General ===<br />
<br />
The iCalendar standard ([http://www.ietf.org/rfc/rfc2445.txt RFC2445]) forms the basis of hCalendar.<br />
<br />
Note: the editor and authors of this specification are tracking the [http://lists.osafoundation.org/pipermail/ietf-calsify/ "iCal-Basic" effort] and intend to base the core hCalendar profile on iCal-Basic. See references for a link to the current draft.<br />
<br />
The basic format of hCalendar is to use iCalendar object/property names in lower-case for class names, and to map the nesting of iCalendar objects directly into nested XHTML.<br />
<br />
=== More Semantic Equivalents ===<br />
<br />
However, for some properties there is a more semantic equivalent, and therefore they get special treatment, e.g.:<br />
* <code>URL</code> in iCalendar becomes <code><a class="url" href="...">...</a></code> inside the element with <code>class="vevent"</code> in hCalendar.<br />
* <code>ATTENDEE</code>, <code>CONTACT</code>, and <code>ORGANIZER</code> in iCalendar may be represented by an [[hcard|hCard]] in hCalendar .<br />
* A named <code>LOCATION</code> (potentially with an address and/or geo) in iCalendar may be represented by a nested [[hcard|hCard]] in hCalendar. Similarly, an address <code>LOCATION</code> may be represented by an [[adr]], and a geo (latitude and longitude) <code>LOCATION</code> may be represented by a [[geo]].<br />
* <code>UID</code> in iCalendar simply becomes another semantic applied to a specific URL for an hCalendar event.<br />
<br />
=== Singular vs. Multivalued Properties ===<br />
<br />
For properties which are singular (e.g. "N" and "FN" from vCard), the first descendant element with that class should take effect, any others being ignored.<br />
<br />
For properties which can be plural (e.g. "TEL" from vCard), each class instance should create a instance of that property. Plural properties with subtypes (e.g. TEL with WORK, HOME, CELL from vCard) can be optimized to share a common element for the property itself, with each instance of subtype being an appropriately classed descendant of the property element.<br />
<br />
==== Plural Properties Singularized ====<br />
<br />
Since plural property names become their singular equivalents, even if the original plural property permitted only a single value with multiple components, those multiple components are represented each with their own singularly named property and the the property is effectively multivalued and subject to the above treatment of multivalued properties.<br />
<br />
=== Human vs. Machine readable ===<br />
If an <code><nowiki><abbr></nowiki></code> element is used for a property, then the '<code>title</code>' attribute of the <code><nowiki><abbr></nowiki></code> element is the value of the property, instead of the contents of the element, which instead provide a human presentable version of the value. This specification recommends that such <code><nowiki><abbr></nowiki></code> elements be used for the following iCalendar properties:<br />
* DTSTART, DTEND, DURATION, RDATE, RRULE<br />
<br />
== Example ==<br />
<br />
Here is a sample event in an iCalendar:<br />
<pre><nowiki><br />
BEGIN:VCALENDAR<br />
PRODID:-//XYZproduct//EN<br />
VERSION:2.0<br />
BEGIN:VEVENT<br />
URL:http://www.web2con.com/<br />
DTSTART:20051005<br />
DTEND:20051008<br />
SUMMARY:Web 2.0 Conference<br />
LOCATION:Argent Hotel\, San Francisco\, CA<br />
END:VEVENT<br />
END:VCALENDAR<br />
</nowiki></pre><br />
and an equivalent event in hCalendar format with various elements optimized appropriately. See [[hcalendar-example1-steps]] for the derivation.<br />
<br />
<pre><nowiki><br />
<span class="vevent"><br />
<a class="url" href="http://www.web2con.com/"><br />
<span class="summary">Web 2.0 Conference</span>: <br />
<abbr class="dtstart" title="2005-10-05">October 5</abbr>-<br />
<abbr class="dtend" title="2005-10-08">7</abbr>,<br />
at the <span class="location">Argent Hotel, San Francisco, CA</span><br />
</a><br />
</span><br />
</nowiki></pre><br />
which could be displayed as:<br />
<br />
[http://www.web2con.com/ Web 2.0 Conference: October 5-7, at the Argent Hotel, San Francisco, CA]<br />
<br />
Note 1: The product information is not necessary since hCalendar is an interchange format. When transforming hCalendar back into iCalendar, the transforming engine should add its own product ID.<br />
<br />
Note 2: A surrounding <code><nowiki><span class="vcalendar"></nowiki></code> element is optional, and is left out as such. It is optional since the context of a vcalendar is implied when a vevent is encountered. The implied context/scope is that of the document. Authors may explicitly use elements with class="vcalendar" to wrap sets of vevents that all belong to the same calendar, e.g. when publishing multiple calendars on the same page.<br />
<br />
Note 3: The version information is unnecessary in hCalendar markup directly since the version will be defined by the profile of hCalendar that is used/referred to in the 'profile' attribute of the <head> element.<br />
<br />
Note 4: ISO8601 dates (required by iCalendar) are not very human friendly. In addition, the year is often understood implicitly by humans from the context. Thus <code><nowiki><abbr></nowiki></code> elements are used to simultaneously provide a human friendly date and/or time in the visible contents of the element, while placing the respective machine parsable comprehensive ISO8601 datetime in the 'title' attribute.<br />
The notation YYYY-MM-DD should be used for better readability.<br />
<br />
Note 5: The difference between the DTEND ISO8601 date (2005-10-08) and the human readable date (7) is NOT a mistake. [http://lists.osafoundation.org/pipermail/ietf-calsify/2005-September/000769.html DTEND is exclusive], meaning, that the event ends just before the DTEND. Thus for events which start on one day and end on another day, the DTEND date must be specified as the day after the day that a human would say is the last day of the event.<br />
<br />
Note 6: The location in this example contains implicit structure (venue name, city, state) which could be marked up explicitly as an [[hcard|hCard]]. See [http://microformats.org/wiki/hcalendar-brainstorming#hCard_locations hCalendar brainstorming: hCard locations] for a informative explanation of how to do this.<br />
<br />
See [[hcalendar-examples]] for more hCalendar examples<br />
<br />
== Examples in the wild ==<br />
This section is '''informative'''.<br />
<br />
The following sites have implemented hCalendar, and thus are a great place to start for anyone looking for examples "in the wild" to try parsing, indexing, organizing etc. If events on your pages are marked up with hCalendar, feel free to add it to the top of this list. Once the list grows too big, we'll make a separate wiki page.<br />
<br />
=== New Examples ===<br />
Please add new examples to this section.<br />
* [http://www.argolon.com/2006/04/17/web20-conference-in-dublin/ Web2.0 Conference in Dublin] hCalendar event<br />
* [http://www.meetup.com/ Meetup.com] has marked up [http://www.meetup.com/cities/us/ny/new_york city event calendars], [http://photo.meetup.com/100/events/ group event lists], and [http://www.meetup.com/ signed-in homepages] with hCalendar.<br />
* [http://ukwindsurfing.com/ ukwindsurfing.com] has marked upcoming events with hCalendar, and the [http://ukwindsurfing.com/events/ events page] in a table.<br />
* [http://ocono.com/ ocono.com] has marked up it's "Upcoming Events" list with hCalendar.<br />
* [http://www.austinbloggers.org/ Austin Bloggers] has marked up their "Upcoming Events" box with hCalendar ([http://www.austinbloggers.org/blog/a/001123.html announcement]).<br />
* Ning's cloneable Group app has [[hcalendar|hCalendar]] markup on its [http://group.ning.com/index.php?controller=event&action=list event calendar] and [http://group.ning.com/index.php?controller=event&action=view&id=727220 event detail] pages.<br />
* [http://tantek.com/microformats/2006/03-01-TechPlenAgenda.html Agenda: W3C Technical Plenary Day, March 1 2006] has [[hcard|hCard]] and [[hcalendar|hCalendar]] markup. ([http://www.w3.org/2006/03/01-TechPlenAgenda.html original here]).<br />
* The National Arbor Day Foundation has started using hCalendars for their [http://arborday.org/programs/conferences/communityforestry/index.cfm upcoming] [http://arborday.org/programs/conferences/hazardtrees-treeplanting/ conferences].<br />
* [http://www.multipack.co.uk The Multipack] features a vevent for the next meeting information.<br />
* [http://www.stateofflux.com/ State of Flux street art site] has started adding events in hCalendar format<br />
* The [http://barcamp.org/#BarCamps BarCamp home page lists upcoming BarCamps marked up with hCalendar] and even has a "Subscribe..." link.<br />
* [http://www.w3.org/2005/12/allgroupoverview.html 2006 W3C Technical Plenary Week] has marked up the schedule and events for the week with hCalendar.<br />
* [http://www.code4lib.org/2006/schedule code4lib Conference 2006 Schedule] is marked up with hCalendar as [http://www.code4lib.org/node/65 announced on their blog].<br />
* [http://grouper.ieee.org/groups/754 IEEE 754 Working Group] - trying hCalendar for upcoming meetings.<br />
* [http://www.pehuen.org/node/494 Elecciones 2005 Chile] - the first spanish language hCalendar event found in the wild.<br />
* [http://www.codewitch.org/it/2005/11/17/no-creative-commons-no-party/ Giocolando » No Creative Commons? No Party!] is marked up with hCalendar<br />
* [http://www.cmprofessionals.org/events/calendar.html CM Pros Events Calendar] by Bob Doyle<br />
* [http://www.midgard-project.org/community/events/ Midgard CMS Event calendar] - as [http://bergie.iki.fi/blog/new-event-calendar-for-midcom.html blogged by Henri Bergius] <br />
* [http://www.iowamilitaryveteransband.com/schedule/ Iowa Military Veterans Band Schedule] - hCalendar markup [http://weblog.randomchaos.com/archive/2005/10/24/Microformats/ added by Scott Reynen]<br />
* [http://www.funfairgames.net/weblog/posts/00000011.html Upcoming events on Jason A.R. Moody Amusements Weblog] posted by Jason Moody on 15 Oct 2005. [http://www.funfairgames.net/weblog/index.html His weblog] in general has hCalendar events posted inside the blog posts.<br />
* [http://tantek.com/microformats/2005/syndicate/tracks-sessions-schedule.html Syndicate - Tracks &amp; Sessions]<br />
* [http://tantek.com/microformats/2005/web2/program.html Web 2.0 Conference schedule page marked up with hCalendar]<br />
* [http://www.thisiscmon.com/ C'MON] is a rock band from Canada, and their [http://www.thisiscmon.com/shows/ tour dates] have been marked up by [http://www.d2digitalmedia.com/ Ray Dickman] with hCalendar.<br />
* [http://ifreebusy.com/ ifreebusy.com] will display freebusy information using hCalendar. See this [http://ifreebusy.com/neiljensen/freebusy/ example].<br />
* [http://we05.com/ Web Essentials 05] has marked up their [http://we05.com/program.cfm program schedule table with hCalendar], using the 'axis' and 'headers' attributes.<br />
* [http://www.asdvbonaparte.nl/ ASDV Bonaparte] is a Dutch debating society. Their events calendar has been marked up with the hCalendar conventions.<br />
* [http://chocnvodka.blogware.com/blog Suw Charman] has marked up [http://suw.org.uk/archives/category/events/ her events] with hCalendar.<br />
* [http://www.blogbusinesssummit.com/ Blog Business Summit] has published their [http://www.blogbusinesssummit.com/details.htm event details] marked up with hCalendar.<br />
* [http://evdb.com EVDB], the Events and Venues database, publishes all events with hCalendar and venues with [[hcard|hCard]]. Took them only 15 minutes to implement both!<br />
* [http://upcoming.org Upcoming.org] publishes all events and lists of events with hCalendar. Took them only an hour to add hCalendar support to the site.<br />
* The [http://laughingsquid.com/squidlist/calendar/ Laughing Squid Calendar] events, [http://laughingsquid.com/squidlist/calendar/9949/2005/5/9 e.g. this party], now supports hCalendar.<br />
* [http://paulschreiber.com/ Paul] Schreiber's [http://concerts.shrub.ca/ Sunnyvale House Concerts] site publishes hCalendar event information for upcoming concerts. In addition the [http://concerts.shrub.ca/shows Past Shows] page contains hCalendar events for all past concerts.<br />
* [http://paulschreiber.com/ Paul] Schreiber's [http://iceoasis.shrub.ca/ unofficial schedule site] publishes hCalendar information for upcoming hockey games at [http://www.iceoasis.com/ Ice Oasis]<br />
* [http://www.complexspiral.com/ Complex Spiral Consulting], both in the "Events" box on left side, and the separate [http://www.complexspiral.com/events/ Events page]. <br />
* [http://tantek.com/log Tantek's Thoughts], specifically the "Events" roll in the right-most column.<br />
* [http://suda.co.uk/projects/holidays/ Lesser Known Holidays], a list of holidays on [http://suda.co.uk suda.co.uk] that can be imported via iCal and hCal so you can compare actual transformation versus intended.<br />
* [http://norman.walsh.name/2005/itinerary/ Norm Walsh's travel schedule] use hCalendar as well as GRDDL.<br />
* [http://www.policyawareweb.org/2005/ftf2/paw-mtg Policy Aware Web (PAW) Project Meeting] uses hCalendar to record date-related decisions, and uses a vtodo microformat to record action items.<br />
* The [http://www.kiez-ev.de/ Kiez] is a small cinema and has published its [http://www.kiez-ev.de/programm.htm program] marked up with hCalendar.<br />
* The [http://lufgi4.informatik.rwth-aachen.de Laboratory for Dependable Distributed Systems] publishes it's [http://lufgi4.informatik.rwth-aachen.de/cfps list of notable CfPs on dependability and security] with hCalendar-todo elements.<br />
* The [http://laughingsquid.com/laughing-squid-10th-anniversary-party/ Laughing Squid 10th Anniversary Party] has an hcalendar page.<br />
* SPRACI has hcalendar versions of its nightlife/clubbing/gigs/festivals listings for many cities worldwide - eg: [http://www.spraci.com/listhcalendar.php?parea=sydney&category=all Events in Sydney] (check the [http://www.spraci.com/api/ API] pages in the faq section of [http://www.spraci.com/ SPRACI] for more info about the area/city keywords and category tags to use to get data for your city/categories<br />
* WWF-Australia events calendars: [http://wwf.org.au/act/events/ What's on], [http://wwf.org.au/act/volunteer/ Volunteer]<br />
* [http://rubyholic.com rubyholic] uses hCalendar to publish calendars for ruby groups.<br />
<br />
=== Examples with some problems ===<br />
* [http://www.webanalyticsassociation.org/en/calendarevents/search.asp Web Analytics Association] - hCalendar microformat is in place on all Tendenci sites on the calendar events search page and consolidated list page.<br />
** WARNINGS<br />
*** has only dates where there should be datetime's<br />
*** has abbr's with no title<br />
*** should probably markup the description --[[User:RyanKing|RyanKing]] 16:04, 6 Jan 2006 (PST)<br />
* [http://www.bokle.de/ s'Bokle] is a German music pub. Their events calendar has been marked up with hCalendar.<br />
** improper use of rrule --[[User:RyanKing|RyanKing]] 16:04, 6 Jan 2006 (PST)<br />
<br />
== Implementations ==<br />
This section is '''informative'''.<br />
<br />
The following implementations have been developed which either generate or parse hCalendars. If you have an hCalendar implementation, feel free to add it to the top of this list. Once the list grows too big, we'll make a separate wiki page.<br />
<br />
=== Authoring ===<br />
Implementations you can use to author, create, and publish hCalendar events.<br />
==== Blogging and CMS tools ====<br />
;Midgard CMS : [http://www.midgard-project.org/documentation/net-nemein-calendar/ Midgard CMS - net.nemein.calendar] - as [http://bergie.iki.fi/blog/new-event-calendar-for-midcom.html blogged by Henri Bergius] <br />
<br />
;Drupal module : [http://hybernaut.com/upcoming-hcal Drupal Upcoming.org syndication module emits hCalendar]<br />
;MovableType and WordPress plug-ins : [http://structuredblogging.org/formats.php StructuredBlogging] is a set of plugins [http://structuredblogging.org/structuredblogging-wp-latest.zip for WordPress] and [http://structuredblogging.org/structuredblogging-wp-latest.zip for MovableType] that supports embedding hCalendar and other microformats in templates and blog posts.<br />
;Textpattern plug-in : [http://placenamehere.com/TXP/pnh_mf/ pnh_mf] is a plugin for [http://textpattern.com/ Textpattern] that supports embedding hCalendar and other microformats in templates and blog posts. Written by [http://placenamehere.com/ Chris Casciano].<br />
<br />
==== Browser scripts and plug-ins ====<br />
Browser plugins that work with existing authoring tools:<br />
; Any browser with javascript and a little bit of CSS : [http://microformats.org/code/hcalendar/creator microformats.org hCalendar creator] (see also original: [http://theryanking.com/ Ryan King] has an [http://theryanking.com/microformats/hcalendar-creator.html hCalendar creator]).<br />
; Firefox Greasemonkey user script hCalendar creator : [http://www.decafbad.com/blog/2005/06/08/greasemonkey_magic magic_hcalendar Greasemonkey user script by Les Orchard] - allows easy form entry of an event into any textarea, e.g. into a blog post text area.<br />
; Firefox Greasemonkey user script hCalendar to Google Calendar: [http://torrez.us Elias Torres] has created a [http://torrez.us/archives/2006/04/13/431/ simple script] that will parse hCalendar entries and create a link to add event to [http://www.google.com/calendar/ Google Calendar's] service. Based on [http://virtuelvis.com/archives/2005/11/learn-to-love-microformats George's] and [http://virtuelvis.com/archives/2005/11/learn-to-love-microformats Arve's] work.<br />
<br />
==== Desktop Authoring Tools ====<br />
;Dreamweaver Extension : [http://www.webstandards.org/action/dwtf/microformats/ Extension suite] for Dreamweaver 8 from the [http://webstandards.org/ Web Standards Project].<br />
;xfy : <br />
In [https://www.xfytec.com/community/ xfy Community], there are some hCalendar implementations.<br />
<br />
* [https://www.xfytec.com/community/modules/mydownloads/singlefile.php?cid=15&lid=25 hCalendar via RSS] parses an RSS feed, retrieves XHTML documents linked from that feed, and syndicates hCalendars into a calendar view.<br />
* [https://www.xfytec.com/community/modules/mydownloads/singlefile.php?cid=19&lid=23 hCalendar Marker XVCD] helps to mark up an event information in XHTML document with hCalendar. <br />
* [https://www.xfytec.com/community/modules/mydownloads/singlefile.php?cid=15&lid=17 Simple RDF Calendar XVCD] is a schedule tool which uses RDF Calendar format. It also converts RDF Calendar format to iCalendar and hCalendar format.<br />
<br />
=== Browsing ===<br />
;Firefox extension: [http://blog.codeeg.com/tails-firefox-extension/ Tails is a Firefox Extension] that will display the presence of microformats ([[hcard|hCard]], [[hcalendar|hCalendar]], [[hreview|hReview]], [[xfolk|xFolk]]) on a webpage.<br />
<br />
;Flock extension: [http://blog.codeeg.com/2006/03/20/flock-tails-flocktails/ Flocktails] - port of Tails extension for Flock 0.5.12 that looks for hCards, hCalendar, xFolk and hReview and tosses them into a handy topbar<br />
<br />
=== Conversion ===<br />
Importing into a Calendar Application by converting hCalendar to iCalendar/vCalendar.<br />
==== Server Based ====<br />
These return iCalendar (.ics) and other calendar formats for easy importing into typical calendar programs or other processing.<br />
* [http://feeds.technorati.com/events Technorati Events Feed service] uses X2V library to parse hCalendar and return iCalendar (.ics). Note friendly URL, e.g. http://feeds.technorati.com/events/http%3A//microformats.org<br />
* [http://suda.co.uk/projects/X2V/ X2V] parses hCalendar and produces a .ics (iCalendar) stream. Note: needs to be updated to track changes in the specification as they occur.<br />
* [http://lifelint.net/ Life Lint Parser] parses hCalendar and produces .ics, .rdf and debugging information and attempts to be more fully compliant to the iCal standard than previous implementations. It can be used in the same manner as X2V. Can output iCal (w optional Outlook 2002 compat), and RDF.<br />
* In [http://www.xfytec.com/community/ xfy Community], there are some hCalendar implementations. "hCalendar via RSS" parses an RSS feed, retrieves XHTML documents linked from that feed, and syndicates hCalendars into a calendar view.<br />
* [http://web.mit.edu/glasser/www/JSCalendar/ JSCalendar] parses hCalendar and produces a displayable HTML table/CSS-based calendar.<br />
==== Firefox Browser Based ====<br />
* [http://george.hotelling.net/90percent/ George] has built a [http://george.hotelling.net/90percent/geekery/greasemonkey_and_microformats.php Greasemonkey user script that detects hCalendar events and allows users to easily add them to their calendar application(s)].<br />
* [http://blogmatrix.blogmatrix.com/ David Janes] has produced a [[Greasemonkey]] [http://www.blogmatrix.com/include/microformat-find.user.js script] that finds many microformat elements, including hCalendar events, and [http://blog.davidjanes.com/mtarchives/2005_08.html#003379 provides a popup menu of actions]. The hCalendar to vCalendar conversion is done internally within the script. ''This does not work with FireFox 1.5+/GreaseMonkey 0.6.4+.''<br />
<br />
=== Libraries ===<br />
; Javascript : [http://virtuelvis.com/archives/2005/11/learn-to-love-microformats simple hCalendar parser] by [http://virtuelvis.com/ Arve Bersvendsen]<br />
; PHP : [http://randomchaos.com/microformats/base/ Microformat Base] is an open-source PHP microformat aggregation crawler, currently recognizing hreview, hcalendar, and hcard.<br />
; Ruby : [http://opensource.reevoo.com/2006/03/08/release-uformats-12/ uformats] is a ruby library that can parse [[hCalendar]], [[hCard]], [[hReview]] and [[rel-tag]]<br />
; XSLT :<br />
* X2V is available as an XSLT library<br />
* [http://dev.w3.org/cvsweb/2001/palmagent/ palmagent] by [[User:DanC]] includes toICal.xsl and test materials; it works much like xhtml2vcal.xsl in X2V. See also: [http://www.w3.org/2002/12/cal/ RDF Calendar workspace] with icalendar test materials.<br />
<br />
=== Potential implementations ===<br />
<br />
These are open source projects that could be potentially enhanced to support hCalendar.<br />
<br />
* [http://www.k5n.us/webcalendar.php?topic=About WebCalendar]<br />
* [http://phpicalendar.net/documentation/index.php?title=Main_Page PHP iCalendar]<br />
* [http://www.vcalendar.org VCalendar]<br />
* Investigation: [http://wiki.mozilla.org/Calendar_Talk:Lightning#hCalendar_publish_and_subscribe_support Mozilla Calendar / Lightning / Sunbird hCalendar support discussion]<br />
<br />
== References ==<br />
=== Normative References ===<br />
* [http://www.w3.org/TR/2002/REC-xhtml1-20020801/ XHTML 1.0 SE]<br />
* [[hcard|hCard]]<br />
* [http://www.ietf.org/rfc/rfc2445.txt iCalendar RFC2445]<br />
<br />
=== Informative References ===<br />
* [http://w3.org/TR/REC-CSS1 CSS1]<br />
* [http://tantek.com/log/2004/09.html#hcalendar hCalendar term introduced and defined on the Web, 20040930]<br />
* [http://wiki.oreillynet.com/foocamp04/index.cgi?HTMLForCalendars FOO Camp 2004 HTML For Calendars presentation, 20040911]<br />
* [http://wiki.oreillynet.com/foocamp04/index.cgi?SimpleSemanticFormats FOO Camp 2004 Simple Semantic Formats presentation, 20040910]<br />
* [http://www.ietf.org/internet-drafts/draft-royer-ical-basic-04.txt iCal-Basic draft 04]<br />
* Contributed from http://developers.technorati.com/wiki/hCalendar<br />
* [http://www.w3.org/TR/xhtml11 XHTML 1.1]<br />
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==== Related ====<br />
* [[icalendar-implementations|iCalendar implementations]]<br />
* [http://lists.osafoundation.org/pipermail/ietf-calsify/ IETF-calsify archives]<br />
* [http://www.livejournal.com/users/jwz/444651.html jwz - Hula] (required reading)<br />
* [http://www.jwz.org/doc/groupware.html Groupware Bad by Jamie Zawinski] crystalizes the reason for hCalendar ('''emphasis''' added):<br />
<blockquote>"Right now people can do that by publishing .ics files, but it's not trivial to do so, and it's work on the part of other people to look at them. '''If it's not HTML hanging off our friend's home page that can be viewed in any browser on a public terminal in a library, the bar to entry is too high and it's useless.'''"</blockquote><br />
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* [http://muddybranch.thejkgroup.com/ Jason Klemow's blog]<br />
* [http://www.softwarestudio.org/iCal/2445Issues.html RFC2445 Issues List]<br />
* [http://ietf.webdav.org/calsify/ CALSIFY WG Links And Resources]<br />
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=== Similar Work ===<br />
* [[XOXO]]<br />
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== Discussions ==<br />
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This specification is a work in progress. As additional aspects are discussed, understood, and written, they will be added. There is a separate document where we are keeping our brainstorms and other explorations relating to hCalendar:<br />
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* [[hcalendar-brainstorming]]<br />
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* See also [http://www.technorati.com/cosmos/referer.html blogs discussing this page].<br />
** [http://weblog.infoworld.com/udell/2006/01/11.html#a1368 Moving forward with microformats] by [http://weblog.infoworld.com/udell Jon Udell] provides an hCalendar example and some discussion.<br />
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=== Q&A ===<br />
* If you have any questions about hCalendar, check the [[hcalendar-faq]], and if you don't find answers, add your questions!<br />
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=== Issues ===<br />
* Please add any issues with the specification to the separate [[hcalendar-issues]] document.</div>TMsk