NAME

Apache::XPointer::RDQL - mod_perl handler 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  "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);

DESCRIPTION

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.

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.

VERSION

1.1

DATE

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

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.