Comparisons between semantic web formats
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Recently, Ian Hickson announced a new microdata section of the HTML5 spec . Microdata provide a method of annotating HTML content for scripted data extraction. Microformats and microdata
Microdata, Microformats, and RDF — Edward O’Connor
RDF-in-HTML could have been so simple. There's been a whole lot of discussion around Microdata , a new approach for embedding machine-readable information into forthcoming HTML5. What I find most attractive about Microdata is the fact that it was designed by HTMLers, not RDFers. It's refreshingly pragmatic, free of other RDF spec legacy, but still capable of expressing most of RDF. Unfortunately, RDFa lobbyists on the HTML WG mailing list forced the spec out of HTML5 core for the time being.
Microdata, semantic markup for both RDFers and non-RDFers - benj
microdata · Microformats Wiki
itemref attribute allows including properties elsewhere on the page that are not descendants of itemscope . Takes space-separated ids (for example itemref="address phone" would include the elements with id="address" and id="phone" ). Conceptually similar to the include-pattern . content attribute on the meta element can be used to include invisible data that is not part of the content. As current browsers move meta inside , make sure to include via itemref .
in HTML 5 · Microformats Wiki
This page is to document future use of microformats in HTML5 . None of the items documented are supported now, and may change upon proper development within the microformats community, or changes in the HTML 5 specification. This page is to track HTML5 enabled enhancements to microformats, and issues that HTML5 raises. It may be used to track issues which we need to push back into the HTML 5 development process. If there are things that microformats would like to mark up that aren't handled by HTML5 explicitly, please let the WHATWG know, so we can improve HTML5.
Update: Fixed a couple of errors in the microdata code. The HTML5 microdata proposal has hit the web, just days before Google announced its support for RDFa (or at least one vocabulary encoded using RDFa attributes ). These are, indeed, “interesting times” for the semantic web. Now, if you’re one of those weirdos who want to embed RDF triples within your web pages, what you’re going to care about is whether you can use microdata to do it. Those of us who have been using RDFa in anger, rather than in toy examples, know that it can be hard to map a particular set of RDF statements onto HTML content. I thought I’d take a look to see just what it would be like to create particular RDF with the HTML5 microdata proposal.
What You Can't Do with HTML5 Microdata | Jeni's Musings