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<title>Biblio::Citation::Parser 1.10 Documentation - Reference Parsing</title>
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<tr><td class="block" valign="middle">
<big><strong><span class="block"> Biblio::Citation::Parser 1.10 Documentation - Reference Parsing</span></strong></big>
</td></tr>
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<p><a name="__index__"></a></p>
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<ul>
<li><a href="#parsing_references">Parsing References</a></li>
<li><a href="#creating_an_openurl">Creating an OpenURL</a></li>
<li><a href="#metadata_structure">Metadata Structure</a></li>
</ul>
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<hr />
<p>
</p>
<h1><a name="parsing_references">Parsing References</a></h1>
<p>Biblio::Citation::Parser is designed for parsing citations, and this can be done very simply:</p>
<pre>
use Biblio::Citation::Parser::Standard;
my $parser = new Biblio::Citation::Parser::Standard();
my $metadata = $parser->parse("Jewell, M (2002) Parsing Examples");</pre>
<p>The <code>$metadata</code> variable is a hash containing the information extracted from the reference.</p>
<p>If you'd prefer to use another parser, simply substitute the 'Standard' for the appropriate module. Biblio::Citation::Parser is distributed with the Jiao module, which is a slightly modified version of a module created by Zhuoan Jiao. To use this instead of the Standard module, you would do the following:</p>
<pre>
use Biblio::Citation::Parser::Jiao;
my $parser = new Biblio::Citation::Parser::Jiao();
my $metadata = $parser->parse("Jewell, M (2002) Parsing Examples");</pre>
<p>The Standard module provides slightly richer metadata than the Jiao module, but it does rely on templates (see Biblio::Citation::Parser::Templates) so requires updating as new citation formats are found.</p>
<p>
</p>
<hr />
<h1><a name="creating_an_openurl">Creating an OpenURL</a></h1>
<p>Once you have the metadata from the reference, it is easy to create an OpenURL from it:</p>
<pre>
use Biblio::Citation::Parser::Standard;
use Biblio::Citation::Parser::Utils;
my $parser = new Biblio::Citation::Parser::Standard();
my $metadata = $parser->parse("Jewell, M (2002) Parsing Examples");
my $openurl = create_openurl($metadata);</pre>
<p>The OpenURLs created by Biblio::Citation::Parser do not have a Base URL prefixed, so this should be carried out before they are used (the ParaCite base URL is <a href="http://paracite.eprints.org/cgi-bin/openurl.cgi).">http://paracite.eprints.org/cgi-bin/openurl.cgi).</a></p>
<p>If you would like to try to extract more information from the metadata, you can use the <code>decompose_openurl</code> function:</p>
<pre>
my ($enriched_metadata, @errors) = decompose_openurl($metadata);
This tries to extract information from SICIs, page ranges, etc, and also checks the fields for validity (the C<@errors> array contains any mistakes).</pre>
<p>Note that the create_openurl has been superceded by URI::OpenURL, but the metadata returned by <code>trim_openurl</code> is in the correct format to be passed to this module.</p>
<p>
</p>
<hr />
<h1><a name="metadata_structure">Metadata Structure</a></h1>
<p>Biblio::Citation::Parser supports all of the fields specified in Table 1 of the OpenURL specification (http://www.sfxit.com/openurl/openurl.html). Specific parsers can add their own fields, but these are not exported when OpenURLs are created. Biblio::Citation::Parser::Standard provides the following extra fields:</p>
<dl>
<dt><strong><a name="item_marked"><strong>marked</strong></a></strong><br />
</dt>
<dd>
A marked-up version of the reference. e.g. <author>Jewell, M</author> (<year>2002</year>) <title>A title</title>.
</dd>
<p></p>
<dt><strong><a name="item_match"><strong>match</strong></a></strong><br />
</dt>
<dd>
The template matched by Biblio::Citation::Parser::Standard
</dd>
<p></p>
<dt><strong><a name="item_ref"><strong>ref</strong></a></strong><br />
</dt>
<dd>
The original reference
</dd>
<p></p></dl>
<table border="0" width="100%" cellspacing="0" cellpadding="3">
<tr><td class="block" valign="middle">
<big><strong><span class="block"> Biblio::Citation::Parser 1.10 Documentation - Reference Parsing</span></strong></big>
</td></tr>
</table>
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