Provided by: libxml-grddl-perl_0.003-1_all bug


       XML::GRDDL - transform XML and XHTML to RDF


       High-level interface:

        my $grddl = XML::GRDDL->new;
        my $model = $grddl->data($xmldoc, $baseuri);
        # $model is an RDF::Trine::Model

       Low-level interface:

        my $grddl = XML::GRDDL->new;
        my @transformations = $grddl->discover($xmldoc, $baseuri);
        foreach my $t (@transformations)
          # $t is an XML::GRDDL::Transformation
          my ($output, $mediatype) = $t->transform($xmldoc);
          # $output is a string of type $mediatype.


       GRDDL is a W3C Recommendation for extracting RDF data from arbitrary XML and XHTML via a
       transformation, typically written in XSLT. See <> for more

       This module implements GRDDL in Perl. It offers both a low level interface, allowing you
       to generate a list of transformations associated with the document being processed, and
       thus the ability to selectively run the transformation; and a high-level interface where a
       single RDF model is returned representing the union of the RDF graphs generated by
       applying all available transformations.

           The constructor accepts no parameters and returns an XML::GRDDL object.

       "$grddl->discover($xml, $base, %options)"
           Processes the document to discover the transformations associated with it. $xml is the
           raw XML source of the document, or an XML::LibXML::Document object. ($xml cannot be
           "tag soup" HTML, though you should be able to use HTML::HTML5::Parser to parse tag
           soup into an XML::LibXML::Document.) $base is the base URI for resolving relative

           Returns a list of XML::GRDDL::Transformation objects.

           Options include:

           ·   force_rel - boolean; interpret XHTML rel="transformation" even in the absence of
               the GRDDL profile.

           ·   strings - boolean; return a list of plain strings instead of blessed objects.

       "$grddl->data($xml, $base, %options)"
           Processes the document, discovers the transformations associated with it, applies the
           transformations and merges the results into a single RDF model. $xml and $base are as
           per "discover".

           Returns an RDF::Trine::Model containing the data. Statement contexts (a.k.a. named
           graphs / quads) are used to distinguish between data from the result of each

           Options include:

           ·   force_rel - boolean; interpret XHTML rel="transformation" even in the absence of
               the GRDDL profile.

           ·   metadata - boolean; include provenance information in the default graph (a.k.a.
               nil context).

       "$grddl->ua( [$ua] )"
           Get/set the user agent used for HTTP requests. $ua, if supplied, must be an


       XML::GRDDL supports transformations written in XSLT 1.0, and in RDF-EASE.

       XML::GRDDL is a good HTTP citizen: Referer headers are included in requests, and
       appropriate Accept headers supplied. To be an even better citizen, I recommend changing
       the User-Agent header to advertise the name of the application:

        $grddl->ua->default_header(user_agent => 'MyApp/1.0 ');

       Provenance information for GRDDL transformations is returned using the GRDDL vocabulary at <>.

       Certain XHTML profiles and XML namespaces known not to contain any transformations, or to
       contain useless transformations are skipped. See XML::GRDDL::Namespace and
       XML::GRDDL::Profile for details. In particular profiles for RDFa and many Microformats are
       skipped, as RDF::RDFa::Parser and HTML::Microformats will typically yield far superior


       Please report any bugs to <>.

       Known limitations:

       ·   Recursive GRDDL doesn't work yet.

           That is, the profile documents and namespace documents linked to from your primary
           document cannot themselves rely on GRDDL.


       XML::GRDDL::Transformation, XML::GRDDL::Namespace, XML::GRDDL::Profile,
       XML::GRDDL::Transformation::RDF_EASE::Functional, XML::Saxon::XSLT2.

       HTML::HTML5::Parser, RDF::RDFa::Parser, HTML::Microformats.




       This module is derived from Swignition <>.


       Toby Inkster <>.


       Copyright 2008-2011 Toby Inkster

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.