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