parsing-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 or even better CyberNeko may be a useful work around. In particular X2V uses XSLT, and tidy to clean any non-well-formed input before processing it.
Parsing class values
When parsing class values care must be taken:
- Class attributes may contain multiple class names, e.g:
class="foo vcard bar" - Class attributes may contain class names which contain the class name used by a microformat, e.g:
class="foovcardbar"class="foovcard",class="vcardbar". - Multiple class names are seperated by one or more whitespace charchters.
- Class names are case sensitive.
See http://www.w3.org/TR/html401/struct/global.html#h-7.5.2.
JavaScript example
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, to help you generate those long ugly xpath queries. [link broken as of 8 August 2006]
XQuery example
Also using XPath...
<div style="background-color:yellow;">
{
for $a in doc()//div[@class='vcard']
let $b := $a/div[@class='fn org']
let $c := $a/div[@class='adr']
return ($b, $c, <br />)
}
</div>
For example, this could be used against http://technorati.com/about/contact.html. See Firefox extensions for getting XQuery in Firefox.
- Doesn't work so well if the hCard has used
class="org fn"!!
Simple XPath expressions can also be used.
Parsing rel/rev values
Parsing rel and rev values is similar to parsing class values except for the following differences:
- rel and rev values should be separated by one space.
- rel and rev values are case insensitive.
See http://www.w3.org/TR/html401/types.html#type-links.