HTML5 page with microdata (using item IDs)

This page is part of a suite of test pages designed to find out how well various structured data formats are supported by major search engines.

Technical details

This page has contains items marked up with structured data using the HTML5 microdata syntax and the vocabulary. The code on this page is valid HTML5 and the microdata has been checked using Google's Structured Data Testing Tool.

The microdata spec states that a global identifier via the itemid attribute must not be specified on elements [...] whose itemtype attribute specifies a vocabulary that does not support global identifiers. Unfortunately, the current documentation does not make it clear whether items can or should use global identifiers. However, on a discussion group a Google employee has stated that they strongly encourage the use of itemids. Therefore, as an experiment, two versions of this page have been created. This one, which uses itemid attributes with URIs as global identifiers, and an alternative microdata test page that does not use itemid attributes.

Note that the URIs used to identify the items on this page are the same URIs used to identify the corresponding RDF resources on the RDFa test page. Interestingly, when used on this page, the W3's Microdata to RDF Distiller appears to use the itemid URIs as the corresponding resource IDs in the distilled RDF.


The following sections have been marked up with structured data that search engines and other tools should be able to extract:


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