73 lines
2.4 KiB
PHP
73 lines
2.4 KiB
PHP
<?php
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// $Id$
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/**
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* @file
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* Hooks provided by the RDF module.
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*/
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/**
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* @addtogroup hooks
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* @{
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*/
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/**
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* Allow modules to define RDF mappings for bundles.
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*
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* Modules defining their own bundles can specify which RDF semantics should be
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* used to annotate these bundles. These mappings are then used for automatic
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* RDFa output in the HTML code.
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*
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* @return
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* An array of mapping structures. Each mapping has three mandatory keys:
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* - type: The name of an entity type.
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* - bundle: The name of a bundle.
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* - mapping: The mapping structure which applies to the entity type, bundle
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* pair. A mapping structure is an array with keys corresponding to
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* existing field instances in the bundle. Each field is then described in
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* terms of RDF mapping. 'predicates' is an array of RDF predicates which
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* describe the relation between the bundle (subject in RDF) and the value of
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* the field (object in RDF), this value being either some text, another
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* bundle or a URL in general. 'datatype' and 'callback' are used in RDFa to
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* format data so that it's readable by machine: a typical example is a date
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* which can be written in many different formats but should be translated
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* into a uniform format for machine comsumption. 'type' is a string used to
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* determine the type of RDFa markup which will be used in the final HTML
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* output, depending on whether the RDF object is a literal text or another
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* RDF resource. The 'rdftype' key is a special case which is used to define
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* the type of the instance, its value shoud be an array of RDF classes.
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*/
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function hook_rdf_mapping() {
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return array(
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array(
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'type' => 'node',
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'bundle' => 'blog',
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'mapping' => array(
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'rdftype' => array('sioct:Weblog'),
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'title' => array(
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'predicates' => array('dc:title'),
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),
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'created' => array(
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'predicates' => array('dc:date', 'dc:created'),
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'datatype' => 'xsd:dateTime',
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'callback' => 'date_iso8601',
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),
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'body' => array(
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'predicates' => array('content:encoded'),
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),
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'uid' => array(
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'predicates' => array('sioc:has_creator'),
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'type' => 'rel',
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),
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'name' => array(
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'predicates' => array('foaf:name'),
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),
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)
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),
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);
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}
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/**
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* @} End of "addtogroup hooks".
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*/
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