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https://issues.apache.org/jira/browse/TIKA-728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13113472#comment-13113472
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Ken Krugler commented on TIKA-728:
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That's what I was afraid of :)
My head starts to hurt when I have to deal with namespaces and RDF.
So I think I'll just patch my local copy to do the Q&D thing, and wait for
someone with more XML/RDF-fu to deal with it properly.
> Return RDFa meta tags via Metadata
> ----------------------------------
>
> Key: TIKA-728
> URL: https://issues.apache.org/jira/browse/TIKA-728
> Project: Tika
> Issue Type: Improvement
> Reporter: Ken Krugler
> Assignee: Ken Krugler
> Priority: Minor
>
> Open Graph <meta> tags currently get stripped out, and also aren't put into
> the metadata map.
> The reason why is that Open Graph uses RDFa:
> http://stackoverflow.com/questions/2704942/html-validation-error-for-property-attribute/2705090#2705090
> Since <meta property="xxx" content="yyy" /> isn't valid for XHTML 1.0, these
> tags can't be emitted.
> We could take a tag like:
> <meta property="og:url" content="http://www.imdb.com/title/tt0117500/"; />
> and put it into the metadata map as "og:url" =>
> "http://www.imdb.com/title/tt0117500/";
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