Common Tag: Like The Meta Keywords Tag, But Even Better!
Yahoo! says that Common Tag makes “web content more discoverable and enables the community to create more useful applications for aggregating, searching, and browsing the web.
We already began implementing the "Common Tags" on our site. How about you? Do you already use them? If yes, what is your experience so far? If you did not, what do you think about those?
Read more about it here: http://searchengineland.com/yahoo-an...n-better-21021
Last edited by Webnauts; 05-05-2011 at 06:44 PM.
This example from http://www.commontag.org/QuickStartGuide seems (to a beginner) to be a bit ambiguous:
<body xmlns:ctag="http://commontag.org/ns#" rel="ctag:tagged">
<span typeof="ctag:Tag"
rel="ctag:means" resource="http://rdf.freebase.com/ns/en.u2"
property="ctag:label" content="U2"/>
</span>
</body>
Does this mean my real content goes into a second <body>...</body> section afterwards? (I have never seen a HTML document with two body sections.)
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There is another confusing example on the same page:
<body xmlns:ctag="http://commontag.org/ns#" rel="ctag:tagged">
<span typeof="ctag:Tag"
rel="ctag:means" resource="http://rdf.freebase.com/ns/en.u2"
property="ctag:label" content="U2"/>
<span typeof="ctag:Tag"
rel="ctag:means" resource="http://rdf.freebase.com/ns/en/zoo_tv_tour"
property="ctag:label" content="ZooTV"/>
</body>
You note how the first reference to a resource goes /ns/en.u2 but the second goes /ns/en/zoo_tv_tour. At freebase.com they show the two resources being in namespace /en with the two respective keys as shown. Are the "." and "/" interchangeable to join the namespace and keys, or has their example got an error?
--------------------------------------------------------------------------
I'd appreciate some advice. (I hope these queries aren't too n00bish, but if I don't ask, I won't learn.)
Last edited by Vanguard; 06-16-2010 at 07:46 PM. Reason: Tidy examples
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Using multiple body tags is not possible. The ones who maybe do that are self-claimed designers, without any HTML background.
For example how to implement, look at the homepage of seoworkers.com
Thanks. There's some elegant code there.Originally Posted by Webnauts
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I've just spent the evening implementing common tags for my website.
Thanks Webnauts, I followed your example and used wikipedia as the references.
Is there any way to test these tags?
Tony McCreath, Tiggerito = Web Site Advantage
Replace my URL with yours and you will see how it works: http://www.w3.org/2007/08/pyRdfa/ext...eoworkers.com/
But my question is, are you documents marked-up in XHTML+RDFa? To be specific, is this your doctype?
If not, you most probably have validation problems and if that is the case they will most probably be ignored. Validate please your docs with the W3C Markup validator first.Code:<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML+RDFa 1.0//EN' 'http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd'>
That said if you are not marking up your pages in XHTML+RDFa, you better go for microformats "rel" tag.
Look at the source code of seoworkers.com
Last edited by Webnauts; 06-19-2010 at 01:08 PM.
I've been RDFa doctyped for a while :-)
I ran the test and it picked up all my RDFa data in the same way as yours.
What is interesting is that it picks up all href/src attributes and add them as ctag:tagged references?
I would have also thought the idea was that there was one tagged object (body) with multiple tags. But it returns each tag inside a separate tagged element.
Tony McCreath, Tiggerito = Web Site Advantage
First your site does no validate for XHTML+RDFa.
You simply have to add the ctags spans in a <p> or <div> or something like that.
Besides things are not over there. To make sure for maximum machine readability you should use the XML prolog and content type as below:
andCode:<?xml version='1.0' encoding='utf-8'?>
Make sure that you do not get problems with IE browsers versions.Code:<meta http-equiv='Content-Type' content='application/xml+xhtml; charset=UTF-8' />
Also get rid of the <embed> tags! Check here howto: http://www.dexterityunlimited.com/articles/?p=6
I placed the ctags in a div. Later I want to have the tags around the actual text as its being used. And maybe include a usable link to the reference. It looks like I can combine an a tag, its href and the link text with the tag concept:
Do you have a good xhtml+rdfa validator? Stuff like the Firefox Html Validator extension gives lots of warnings and does not understand namespaces and the new attributes.Code:<a href="resource.com/tag.htm" typeof="ctag:Tag" rel="ctag:means" property="ctag:label" class="tag">Tagged Phrase</a>
I actually removed my link to indicate w3c validation because it would not understand this sort of stuff.
I added the xml prolog. Interestingly, Chrome strips it out in its source view, which confused me for a while.
I have a similar content type already, which I scraped from somewhere. Could you confirm which if not both are correct?
<meta http-equiv="content-type" content="application/xhtml+xml; charset=utf-8" />
<meta http-equiv='Content-Type' content='application/xml+xhtml; charset=UTF-8' />
I'd tried removing the embed tag before but the solutions I found all failed with IE8. Yours worked.
cheers.
Tony McCreath, Tiggerito = Web Site Advantage
That is an excellent idea. But I do not always necessarily want to set outbound links.
How about Distiller http://www.w3.org/2007/08/pyRdfa/
You would not understand markup errors?
Then that is Chrome.
<meta http-equiv='Content-Type' content='application/xml+xhtml; charset=UTF-8' />Excellent!
Last edited by Webnauts; 06-22-2010 at 04:18 PM.
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