NAME

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

SYNOPSIS

 <Directory /foo/bar>

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

   PerlSetVar   XPointerSendRangeAs  "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/>));

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

DESCRIPTION

Apache::XPointer is a mod_perl handler to address XML fragments using the HTTP 1.1 Range header and the RDF Data Query Language (RDQL), 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.

IMPORTANT

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

SUPPORTED PARSERS

RDFStore

Consult Apache::XPointer::RDQL::RDFStore

MOD_PERL COMPATIBILITY

This handler will work with both mod_perl 1.x and mod_perl 2.x; it works better in 1.x because it supports Apache::Request which does a better job of parsing CGI parameters.

VERSION

1.0

DATE

$Date: 2004/11/15 14:42:10 $

AUTHOR

Aaron Straup Cope <ascope@cpan.org>

SEE ALSO

Apache::XPointer

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

LICENSE

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.