[Bug 8450] New: Case insensitivity of @rel vs case sensitivity of URIs

http://www.w3.org/Bugs/Public/show_bug.cgi?id=8450

           Summary: Case insensitivity of @rel vs case sensitivity of URIs
           Product: HTML WG
           Version: unspecified
          Platform: PC
               URL: http://dev.w3.org/html5/spec/microdata.html
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec bugs
        AssignedTo: dave.null@w3.org
        ReportedBy: mail@tobyinkster.co.uk
         QAContact: public-html-bugzilla@w3.org
                CC: ian@hixie.ch, mike@w3.org, public-html@w3.org


Under the RDF extraction procedure
<http://dev.w3.org/html5/spec/microdata.html#rdf> any tokens in @rel are
converted to lower-case. This includes instances where URIs have been used as
tokens. Many RDF properties include some upper-case characters, including the
commonly used http://www.w3.org/2000/01/rdf-schema#seeAlso property.

Possible solutions include:

* Require (or at least permit) extractors to consider tokens containing colons
case-sensitively; or

* Document the limitation.


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