[microformats-discuss] A 10 line script to identify and process any microformat

Thu Jul 28 19:13:38 PDT 2005

Alf:
I realized the xpath selector was imperfect in this way but figured 
the types of cases you mentioned would be rare enough to just ignore.
A nitpicking issue with your solution is that it assumes people are 
using class attribute values. I suppose that could be fixed easily 
enough.
Would you mind if I made an update to my post mentioning the issue 
you raise and your solution for how to avoid it? I think it could 
arise in other circumstances that I cannot think of off the top of my 
head, and I'd like people to be aware of the workaround.
Bud
On Jul 28, 2005, at 20:48, Alf Eaton wrote:
> On 29 Jul 2005, at 01:06, Bud Gibson wrote:
>>>>> Dear all:
>>>> I've been inspired by various microformat scripting efforts (in 
>> particular George Hotelling's) and have come up with a 10 line 
>> greasemonkey script that can identify and process any 
>> microformatted content. You can access the script here:
>>>> http://thecommunityengine.com/resources/xfolk-colorize.user.js
>>>>>> Unfortunately, your XPath selector will also match classNames like 
> mixfolkentry, boxfolkentry and xfolkentry2.
>> This is what I'm using:
>> -------------
>> var mf = 'hreview';
>> var micropath = "//*[contains(@class,'" + mf + "')]";
> var micromatch = new RegExp('\\b' + mf + '\\b');
>> var mc = document.evaluate(micropath, document, null, 
> XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
> for (var i = 0; i < mc.snapshotLength; i++) {
> iNode = mc.snapshotItem(i);
> if (iNode.className.match(micromatch))
> doSomething();
> }
>> -------------
>> The problem with all of these approaches is that once you want to 
> parse or extract more than one microformat, you have to check each 
> element of the page for each of a big list of possible classnames. 
> I'd like to propose, therefore (and maybe it's been proposed 
> before), that each microformat should have one common classname: 
> 'microdata', say. Then the main selector can be
> var mc = document.evaluate(//*[contains(@class,'microdata')]", 
> document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
> and you only have to check the big list of possible classnames 
> against that one node.
>> For example, <div class="microdata xfolkentry"> or <div 
> class="microdata hreview"> .
>> alf.
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>>>