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https://issues.apache.org/jira/browse/TIKA-728?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13113475#comment-13113475
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Ken Krugler commented on TIKA-728:
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Antoni said (on the list):
{quote}
There seems to be a long tradition in ASF to appeal to Someone when there is
talk about RDF. Chris Mattman wrote back in November 2007:
"... it's reasonable that someone may need to rewrite the ability to represent
metadata in RDF ..."
Whoever that Someone is - he has my support. ;-)
On a more serious note though. In the four years since that metadata discussion
three separate RDF-related projects have appeared in/around ASF: Clerezza, Jena
and Any23. Two are already in incubation, the third one tries to. Jeremias
Maerki noticed the lack of coordination in the metadata field four years ago.
It's not getting any better.
{quote}
> 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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