Apache::XPointer::RDQL - mod_perl handler for addressing XML fragments using the RDF Data Query Language.

 <Directory /foo/bar>

  <FilesMatch "\.rdf$">
   SetHandler	perl-script
   PerlHandler	Apache::XPointer::RDQL::RDFStore

   PerlSetVar   XPointerSendRangeAs  "application/rdf+xml"
  </FilesMatch>

 </Directory>

 #

 my $ua  = LWP::UserAgent->new();
 my $req = HTTP::Request->new(GET => "http://example.com/foo/bar/baz.rdf");

 $req->header("Range" => qq(SELECT ?title, ?link
                            WHERE
                            (?item, <rdf:type>, <rss:item>),
                            (?item, <rss::title>, ?title),
                            (?item, <rss::link>, ?link)
                            USING
                            rdf for <http://www.w3.org/1999/02/22-rdf-syntax-ns#>,
                            rss for <http://purl.org/rss/1.0/>));

 $req->header("Accept" => qq(mulitpart/mixed));

 my $res = $ua->request($req);

Apache::XPointer::RDQL::RDFStore is a mod_perl handler to address XML fragments using the HTTP 1.1 Range and Accept headers and the XPath scheme, as described in the paper : A Semantic Web Resource Protocol: XPointer and HTTP.

Additionally, the handler may also be configured to recognize a conventional CGI parameter as a valid range identifier.

If no 'range' property is found, then the original document is sent unaltered.

If an Accept header is specified with no corresponding match, then the server will return (406) HTTP_NOT_ACCEPTABLE.

Successful queries will return (206) HTTP_PARTIAL_CONTENT.

This package is a base class and not expected to be invoked directly. Please use one of the RDQL parser-specific handlers instead.

Consult Apache::XPointer::RDQL::RDFStore

This handler will work with both mod_perl 1.x and mod_perl 2.x.

1.1

$Date: 2004/11/16 04:33:33 $

Aaron Straup Cope <ascope@cpan.org>

Apache::XPointer

http://www.w3.org/Submission/RDQL/

Copyright (c) 2004 Aaron Straup Cope. All rights reserved.

This is free software, you may use it and distribute it under the same terms as Perl itself.