From Microformats

Parsing Microformats

Microformat parsing mechanisms that depend on documents having even minimal xml properties like well-formedness may fail when consuming non-well-formed content. Tidy (http://tidy.sourceforge.net/) or even better CyberNeko (http://people.apache.org/~andyc/neko/doc/html/) may be a useful work around. In particular X2V (http://suda.co.uk/projects/X2V/) uses XSLT, and tidy (http://tidy.sourceforge.net/) to clean any non-well-formed input before processing it.

Parsing class values

When parsing class values care must be taken:

1. Class attributes may contain multiple class names, e.g: class="foo vcard bar"
2. Class attributes may contain class names which contain the class name used by a microformat, e.g: class="foovcardbar" class="foovcard", class="vcardbar".
3. Multiple class names are seperated by one or more whitespace charchters.
4. Class names are case sensitive.

See http://www.w3.org/TR/html401/struct/global.html#h-7.5.2.

JavaScript example

The Ultimate getElementsByClassName (http://www.robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/) JavaScript function may be useful. Then you can do:

var adrs = document.getElementsByClassName(document, "*", "adr");

or even:

var cities = document.getElementsByClassName(document, "*", "locality");

XSLT example

<xsl:if test="contains(
   concat (' ', normalize-space(@class),' '),
   ' vcard '
   )" > ...

xpath generator (http://balloon.hobix.com/xpath-generator), to help you generate those long ugly xpath queries. [link broken as of 8 August 2006]

Parsing rel/rev values

Parsing rel and rev values is similar to parsing class values except for the following differences:

1. rel and rev values should be separated by one space.
2. rel and rev values are case insensitive.

See http://www.w3.org/TR/html401/types.html#type-links.

See Also

• xmdp-brainstorming