NAME
    Net::Flickr::RDF - a.k.a RDF::Describes::Flickr

SYNOPSIS
     use Net::Flickr::RDF;
     use Config::Simple;
     use IO::AtomicFile;

     my $cfg = Config::Simple->new("/path/to/my.cfg");
     my $rdf = Net::Flickr::RDF->new($cfg);

     my $fh  = IO::AtomicFile->open("/foo/bar.rdf","w");

     $rdf->describe_photo({photo_id => 123,
                           secret   => 567,
                           fh       => \*$fh});

     $fh->close();

DESCRIPTION
    Describe Flickr photos as RDF.

    This package inherits from *Net::Flickr::API*.

OPTIONS
    Options are passed to Net::Flickr::Backup using a Config::Simple object
    or a valid Config::Simple config file. Options are grouped by "block".

  flickr
    * api_key
        String. *required*

        A valid Flickr API key.

    * api_secret
        String. *required*

        A valid Flickr Auth API secret key.

    * auth_token
        String. *required*

        A valid Flickr Auth API token.

PACKAGE METHODS
  __PACKAGE__->new($cfg)
    Where $cfg is either a valid *Config::Simple* object or the path to a
    file that can be parsed by *Config::Simple*.

    Returns a *Net::Flickr::RDF* object.

OBJECT METHODS YOU SHOULD CARE ABOUT
  $obj->describe_photo(\%args)
    Valid arguments are :

    * photo_id
        Int. *required*

    * secret
        String.

    * fh
        File-handle.

        Default is STDOUT.

    Returns true or false.

OBJECT METHODS YOU MAY CARE ABOUT
  $obj->collect_photo_data($photo_id,$secret)
    Returns a hash ref of the meta data associated with a photo.

    If any errors are unencounter an error is recorded via the log method
    and the method returns undef.

  $obj->collect_group_data($group_id)
    Returns a hash ref of the meta data associated with a group.

    If any errors are unencounter an error is recorded via the log method
    and the method returns undef.

  $obj->collect_user_data($user_id)
    Returns a hash ref of the meta data associated with a user.

    If any errors are unencounter an error is recorded via the log method
    and the method returns undef.

  $obj->collect_photoset_data($photoset_id)
    Returns a hash ref of the meta data associated with a photoset.

    If any errors are unencounter an error is recorded via the log method
    and the method returns undef.

  $obj->collect_cc_data()
    Returns a hash ref of the Creative Commons licenses used by Flickr.

    If any errors are unencounter an error is recorded via the log method
    and the method returns undef.

  $obj->make_photo_triples(\%data)
    Returns an array ref of array refs of the meta data associated with a
    photo (*%data*).

  $obj->make_user_triples(\%user_data)
    Returns an array ref of array refs of the meta data associated with a
    user (*%user_data*).

  $obj->make_cc_triples($url)
    Returns an array ref of array refs of the meta data associated with a
    Creative Commons license (*$url*).

  $obj->namespaces()
    Returns a hash ref of the prefixes and namespaces used by
    *Net::Flickr::RDF*

    The default key/value pairs are :

    a   http://www.w3.org/2000/10/annotation-ns

    acl http://www.w3.org/2001/02/acls#

    cc  http://web.resource.org/cc/

    dc  http://purl.org/dc/elements/1.1/

    dcterms
        http://purl.org/dc/terms/

    exif
        http://nwalsh.com/rdf/exif#

    exifi
        http://nwalsh.com/rdf/exif-intrinsic#

    flickr
        x-urn:flickr:

    foaf
        http://xmlns.com/foaf/0.1/#

    geo http://www.w3.org/2003/01/geo/wgs84_pos#

    i   http://www.w3.org/2004/02/image-regions#

    rdf http://www.w3.org/1999/02/22-rdf-syntax-ns#

    rdfs
        http://www.w3.org/2000/01/rdf-schema#

    skos
        http://www.w3.org/2004/02/skos/core#

  $obj->namespace_prefix($uri)
    Return the namespace prefix for *$uri*

  $obj->uri_shortform($prefix,$name)
    Returns a string in the form of *prefix*:*property*. The property is the
    value of $name. The prefix passed may or may be the same as the prefix
    returned depending on whether or not the user has defined or redefined
    their own list of namespaces.

    Unless this package is subclassed the prefix passed to the method is
    assumed to be one of prefixes in the default list of namespaces.

  $obj->build_user_tag_uri(\@data)
    Returns a URL as a string.

  $obj->build_global_tag_uri(\@data)
    Returns a URL as a string.

  $obj->build_user_uri($user_id)
    Returns a URL as a string.

  $obj->api_call(\%args)
    Valid args are :

    * method
        A string containing the name of the Flickr API method you are
        calling.

    * args
        A hash ref containing the key value pairs you are passing to
        *method*

    If the method encounters any errors calling the API, receives an API
    error or can not parse the response it will log an error event, via the
    log method, and return undef.

    Otherwise it will return a *XML::LibXML::Document* object (if
    XML::LibXML is installed) or a *XML::XPath* object.

  $obj->log()
    Returns a *Log::Dispatch* object.

VERSION
    1.2

DATE
    $Date: 2005/10/05 05:40:54 $

AUTHOR
    Aaron Straup Cope <ascope@cpan.org>

EXAMPLES
  CONFIG FILES
    This is an example of a Config::Simple file used to collect RDF data
    from Flickr

     [flickr] 
     api_key=asd6234kjhdmbzcxi6e323
     api_secret=s00p3rs3k3t
     auth_token=123-omgwtf4u

  RDF
    This is an example of an RDF dump for a photograph backed up from Flickr
    :

     <?xml version='1.0'?>    
     <rdf:RDF
      xmlns:dc="http://purl.org/dc/elements/1.1/"
      xmlns:a="http://www.w3.org/2000/10/annotation-ns"
      xmlns:acl="http://www.w3.org/2001/02/acls#"
      xmlns:cc="http://web.resource.org/cc/"
      xmlns:exif="http://nwalsh.com/rdf/exif#"
      xmlns:skos="http://www.w3.org/2004/02/skos/core#"
      xmlns:foaf="http://xmlns.com/foaf/0.1/"
      xmlns:exifi="http://nwalsh.com/rdf/exif-intrinsic#"
      xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      xmlns:computer="x-urn:freebsd:"
      xmlns:i="http://www.w3.org/2004/02/image-regions#"
      xmlns:flickr="x-urn:flickr:"
      xmlns:dcterms="http://purl.org/dc/terms/">

      <flickr:photo rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528">
        <exif:isoSpeedRatings>1250</exif:isoSpeedRatings>
        <exif:apertureValue>336/100</exif:apertureValue>
        <exif:pixelYDimension>960</exif:pixelYDimension>
        <exif:focalLength>4.5 mm</exif:focalLength>
        <acl:access>visbility</acl:access>
        <exif:colorSpace>sRGB</exif:colorSpace>
        <exif:dateTimeOriginal>2005:08:02 18:12:19</exif:dateTimeOriginal>
        <dc:rights>All rights reserved.</dc:rights>
        <exif:shutterSpeedValue>4321/1000</exif:shutterSpeedValue>
        <dc:description></dc:description>
        <exif:exposureTime>0.05 sec (263/5260)</exif:exposureTime>
        <dc:created>2005-08-02T18:12:19-0700</dc:created>
        <dc:dateSubmitted>2005-08-02T18:16:20-0700</dc:dateSubmitted>
        <exif:gainControl>High gain up</exif:gainControl>
        <exif:flash>32</exif:flash>
        <exif:digitalZoomRatio>100/100</exif:digitalZoomRatio>
        <exif:pixelXDimension>1280</exif:pixelXDimension>
        <exif:dateTimeDigitized>2005:08:02 18:12:19</exif:dateTimeDigitized>
        <dc:title>20050802(007).jpg</dc:title>
        <exif:fNumber>f/3.2</exif:fNumber>
        <acl:accessor>public</acl:accessor>
        <dc:creator rdf:resource="http://www.flickr.com/people/35034348999@N01"/>
        <dc:subject rdf:resource="http://www.flickr.com/people/tags/usa"/>
        <dc:subject rdf:resource="http://www.flickr.com/people/tags/california"/>
        <dc:subject rdf:resource="http://www.flickr.com/people/tags/sanfrancisco"/>
        <dc:subject rdf:resource="http://www.flickr.com/people/tags/cameraphone"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140939"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140942"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140945"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140946"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140952"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1142648"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1142656"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1143239"/>
        <a:hasAnnotation rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528#note-1148950"/>
      </flickr:photo>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140942">
        <i:boundingBox>468 141 22 26</i:boundingBox>
        <a:body>*sigh*</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/44124415257@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <dcterms:StillImage rdf:about="http://static.flickr.com/23/30763528_a981fab285_s.jpg">
        <dcterms:relation>Square</dcterms:relation>
        <exifi:height>75</exifi:height>
        <exifi:width>75</exifi:width>
        <dcterms:isVersionOf rdf:resource="http://static.flickr.com/23/30763528_a981fab285_o.jpg"/>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </dcterms:StillImage>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1142656">
        <i:boundingBox>357 193 81 28</i:boundingBox>
        <a:body>eww!</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/32373682187@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <flickr:user rdf:about="http://www.flickr.com/people/44124415257@N01">
        <foaf:mbox_sha1sum>4f6f211958d5217ef0d10f7f5cd9a69cd66f217e</foaf:mbox_sha1sum>
        <foaf:name>Karl Dubost</foaf:name>
        <foaf:nick>karlcow</foaf:nick>
      </flickr:user>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140939">
        <i:boundingBox>326 181 97 25</i:boundingBox>
        <a:body>Did you see that this shirt makes me a beautiful breast?</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/44124415257@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <flickr:tag rdf:about="http://www.flickr.com/photos/35034348999@N01/tags/usa">
        <skos:prefLabel>usa</skos:prefLabel>
        <dc:creator rdf:resource="http://www.flickr.com/people/35034348999@N01"/>
        <dcterms:isPartOf rdf:resource="http://flickr.com/photos/tags/usa"/>
      </flickr:tag>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140952">
        <i:boundingBox>9 205 145 55</i:boundingBox>
        <a:body>Do you want my opinion? There's a love affair going on here… Anyway. Talking non sense. We all know Heather is committed to Flickr. She even only dresses at FlickrApparel. Did they say &amp;quot;No Logo&amp;quot;. Doh Dude.</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/44124415257@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <dcterms:StillImage rdf:about="http://static.flickr.com/23/30763528_a981fab285_m.jpg">
        <dcterms:relation>Small</dcterms:relation>
        <exifi:height>180</exifi:height>
        <exifi:width>240</exifi:width>
        <dcterms:isVersionOf rdf:resource="http://static.flickr.com/23/30763528_a981fab285_o.jpg"/>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </dcterms:StillImage>

      <flickr:tag rdf:about="http://www.flickr.com/photos/35034348999@N01/tags/cameraphone">
        <skos:prefLabel>cameraphone</skos:prefLabel>
        <dc:creator rdf:resource="http://www.flickr.com/people/35034348999@N01"/>
        <dcterms:isPartOf rdf:resource="http://flickr.com/photos/tags/cameraphone"/>
      </flickr:tag>

      <computer:user rdf:about="x-urn:dhclient#asc">
        <foaf:name>Aaron Straup Cope</foaf:name>
        <foaf:nick>asc</foaf:nick>
      </computer:user>

      <flickr:user rdf:about="http://www.flickr.com/people/34427469121@N01">
        <foaf:mbox_sha1sum>216d56f03517c68e527c5b970552a181980c4389</foaf:mbox_sha1sum>
        <foaf:name>George Oates</foaf:name>
        <foaf:nick>George</foaf:nick>
      </flickr:user>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140946">
        <i:boundingBox>355 31 103 95</i:boundingBox>
        <a:body>(Yes… I love you heather, you are my dream star)</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/44124415257@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <rdf:Description rdf:about="x-urn:flickr:tag">
        <rdfs:subClassOf rdf:resource="http://www.w3.org/2004/02/skos/core#Concept"/>
      </rdf:Description>

      <rdf:Description rdf:about="file:///home/asc/photos/2005/08/02/20050802-30763528-20050802_007.jpg">
        <dcterms:created>2005-09-25T15:16:28Z</dcterms:created>
        <dc:creator rdf:resource="x-urn:dhclient#asc"/>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </rdf:Description>

      <rdf:Description rdf:about="file:///home/asc/photos/2005/08/02/20050802-30763528-20050802_007_m.jpg">
        <dcterms:created>2005-09-25T15:16:28Z</dcterms:created>
        <dc:creator rdf:resource="x-urn:dhclient#asc"/>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </rdf:Description>

      <rdf:Description rdf:about="x-urn:freebsd:user">
        <rdfs:subClassOf rdf:resource="http://xmlns.com/foaf/0.1/Person"/>
      </rdf:Description>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1143239">
        <i:boundingBox>184 164 50 50</i:boundingBox>
        <a:body>Baaaaarp!</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/34427469121@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <rdf:Description rdf:about="file:///home/asc/photos/2005/08/02/20050802-30763528-20050802_007_s.jpg">
        <dcterms:created>2005-09-25T15:16:28Z</dcterms:created>
        <dc:creator rdf:resource="x-urn:dhclient#asc"/>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </rdf:Description>

      <dcterms:StillImage rdf:about="http://static.flickr.com/23/30763528_a981fab285_t.jpg">
        <dcterms:relation>Thumbnail</dcterms:relation>
        <exifi:height>75</exifi:height>
        <exifi:width>100</exifi:width>
        <dcterms:isVersionOf rdf:resource="http://static.flickr.com/23/30763528_a981fab285_o.jpg"/>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </dcterms:StillImage>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1140945">
        <i:boundingBox>433 103 50 50</i:boundingBox>
        <a:body>(fuck… fuck…)</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/44124415257@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <flickr:user rdf:about="http://www.flickr.com/people/32373682187@N01">
        <foaf:mbox_sha1sum>62bf10c8d5b56623226689b7be924c64dee5e94a</foaf:mbox_sha1sum>
        <foaf:name>heather powazek champ</foaf:name>
        <foaf:nick>heather</foaf:nick>
      </flickr:user>

      <rdf:Description rdf:about="x-urn:flickr:user">
        <rdfs:subClassOf rdf:resource="http://xmlns.com/foaf/0.1/Person"/>
      </rdf:Description>

      <flickr:tag rdf:about="http://www.flickr.com/photos/35034348999@N01/tags/california">
        <skos:prefLabel>california</skos:prefLabel>
        <dc:creator rdf:resource="http://www.flickr.com/people/35034348999@N01"/>
        <dcterms:isPartOf rdf:resource="http://flickr.com/photos/tags/california"/>
      </flickr:tag>

      <dcterms:StillImage rdf:about="http://static.flickr.com/23/30763528_a981fab285.jpg">
        <dcterms:relation>Medium</dcterms:relation>
        <exifi:height>375</exifi:height>
        <exifi:width>500</exifi:width>
        <dcterms:isVersionOf rdf:resource="http://static.flickr.com/23/30763528_a981fab285_o.jpg"/>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </dcterms:StillImage>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1142648">
        <i:boundingBox>202 224 50 50</i:boundingBox>
        <a:body>dude! who did this?</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/32373682187@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <dcterms:StillImage rdf:about="http://static.flickr.com/23/30763528_a981fab285_o.jpg">
        <dcterms:relation>Original</dcterms:relation>
        <exifi:height>960</exifi:height>
        <exifi:width>1280</exifi:width>
        <rdfs:seeAlso rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </dcterms:StillImage>

      <flickr:user rdf:about="http://www.flickr.com/people/35034348999@N01">
        <foaf:mbox_sha1sum>a4d1b5e38db5e2ed4f847f9f09fd51cf59bc0d3f</foaf:mbox_sha1sum>
        <foaf:name>Aaron</foaf:name>
        <foaf:nick>straup</foaf:nick>
      </flickr:user>

      <flickr:note rdf:about="http://www.flickr.com/photos/35034348999@N01/30763528#note-1148950">
        <i:boundingBox>342 197 28 33</i:boundingBox>
        <a:body>Is that just one big boob, or...?</a:body>
        <i:regionDepicts rdf:resource="http://static.flickr.com/23/30763528_a981fab285.jpg"/>
        <a:author rdf:resource="http://www.flickr.com/people/34427469121@N01"/>
        <a:annotates rdf:resource="http://www.flickr.com/photos/35034348999@N01/30763528"/>
      </flickr:note>

      <rdf:Description rdf:about="x-urn:flickr:note">
        <rdfs:subClassOf rdf:resource="http://www.w3.org/2000/10/annotation-nsAnnotation"/>
      </rdf:Description>

      <flickr:tag rdf:about="http://www.flickr.com/photos/35034348999@N01/tags/sanfrancisco">
        <skos:prefLabel>san francisco</skos:prefLabel>
        <skos:altLabel>sanfrancisco</skos:altLabel>
        <dc:creator rdf:resource="http://www.flickr.com/people/35034348999@N01"/>
        <dcterms:isPartOf rdf:resource="http://flickr.com/photos/tags/sanfrancisco"/>
      </flickr:tag>

     </rdf:RDF>

SEE ALSO
    Net::Flickr::API

    RDF::Simple

TO DO
    *   Methods for describing more than just a photo; groups, tags, etc.

    *   Update bounding boxes to be relative to individual images

    *   Proper tests

    Patches are welcome.

BUGS
    Please report all bugs via http://rt.cpan.org/

LICENSE
    Copyright (c) 2005 Aaron Straup Cope. All Rights Reserved.

    This is free software. You may redistribute it and/or modify it under
    the same terms as Perl itself.