NAME
    RDF::KV - Embed RDF linked data in plain old HTML forms

VERSION
    Version 0.04

SYNOPSIS
        my $kv = RDF::KV->new(
            subject    => $uri,      # ordinarily the Request-URI
            graph      => $graphuri, # URI for the default graph
            namespaces => $ns,       # default namespace prefix map
            callback   => \&rewrite, # form-results-rewriting callback
        );

        # Processes a hashref-of-parameters, like found in Catalyst or
        # Plack::Request. This call will ignore obviously non-matching
        # keys, but will croak on botched attempts to use the protocol.

        my $patch = eval { $kv->process($params) };
        if ($@) {
            # return 409 Conflict ...
        }

        # add/remove statements from the graph
        $patch->apply($model);

DESCRIPTION
    This module provides a reference implementation for the RDF-KV protocol
    <http://doriantaylor.com/rdf-kv>. The objective of this protocol is to
    convey RDF linked data from a web browser to a web server using no
    mechanism beyond conventional "application/x-www-form-urlencoded" HTML
    forms. The overarching purpose is to facilitate the development of
    linked data applications by making the apparatus of JavaScript an
    *optional*, rather than a *mandatory*, consideration.

    This protocol implementation works by culling key-value pairs denoted in
    a prescribed syntax from POSTed form input (parsed by something like
    CGI, Plack::Request or Catalyst), and then stitching them together to
    create a patch object which is then applied to an RDF::Trine::Model
    graph.

METHODS
  new
    Instantiate the object. The following parameters are also (read-only)
    accessors.

    subject
        This is the default subject URI (or blank node).

    graph
        This is the default graph URI.

    namespaces
        This URI::NamespaceMap object will enable URI abbreviation through
        the use of CURIEs in form input.

    callback
        Supply a callback function that will be applied to subject and
        object values, for instance to rewrite a URI. The return value of
        this function must be understood by "add_this" in RDF::KV::Patch.

  process \%CONTENT
    Process form content and return an RDF::KV::Patch object. This is the
    only significant method.

CAVEATS
    BYOS == Bring Your Own Security.

AUTHOR
    Dorian Taylor, "<dorian at cpan.org>"

BUGS
    Please report any bugs or feature requests to "bug-rdf-kv at
    rt.cpan.org", or through the web interface at
    <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=RDF-KV>. I will be
    notified, and then you'll automatically be notified of progress on your
    bug as I make changes.

SUPPORT
    You can find documentation for this module with the perldoc command.

        perldoc RDF::KV

    You can also look for information at:

    *   RT: CPAN's request tracker (report bugs here)

        <http://rt.cpan.org/NoAuth/Bugs.html?Dist=RDF-KV>

    *   AnnoCPAN: Annotated CPAN documentation

        <http://annocpan.org/dist/RDF-KV>

    *   CPAN Ratings

        <http://cpanratings.perl.org/d/RDF-KV>

    *   Search CPAN

        <http://search.cpan.org/dist/RDF-KV/>

SEE ALSO
    RDF::KV::Patch
    URI::BNode
    RDF::Trine

LICENSE AND COPYRIGHT
    Copyright 2013 Dorian Taylor.

    Licensed under the Apache License, Version 2.0 (the "License"); you may
    not use this file except in compliance with the License. You may obtain
    a copy of the License at <http://www.apache.org/licenses/LICENSE-2.0>.

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.