107 lines
3.6 KiB
PHP
107 lines
3.6 KiB
PHP
<?php
|
|
|
|
/**
|
|
* @file
|
|
* Hooks provided by the RDF module.
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup hooks
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* Allow modules to define RDF mappings for field bundles.
|
|
*
|
|
* Modules defining their own field 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
|
|
* A list of mapping structures, where each mapping is an associative array:
|
|
* - type: The name of an entity type (e.g., 'node', 'comment', and so on.)
|
|
* - bundle: The name of the bundle (e.g., 'page', 'blog', or
|
|
* RDF_DEFAULT_BUNDLE for default mappings.)
|
|
* - mapping: The mapping structure which applies to the entity type and
|
|
* bundle. A mapping structure is an array with keys corresponding to
|
|
* existing field instances in the bundle. Each field is then described in
|
|
* terms of the RDF mapping:
|
|
* - predicates: An array of RDF predicates which describe the relation
|
|
* between the bundle (RDF subject) and the value of the field (RDF
|
|
* object). This value is either some text, another bundle, or a URI in
|
|
* general.
|
|
* - datatype: Is used along with 'callback' to format data so that it is
|
|
* readable by machines. A typical example is a date which can be written
|
|
* in many different formats but should be translated into a uniform
|
|
* format for machine consumption.
|
|
* - callback: A function name to invoke for 'datatype'.
|
|
* - type: 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.
|
|
* - rdftype: A special property used to define the type of the instance.
|
|
* Its value should be an array of RDF classes.
|
|
*
|
|
* @ingroup rdf
|
|
*/
|
|
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'),
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Allow modules to define namespaces for RDF mappings.
|
|
*
|
|
* Many common namespace prefixes are defined in rdf_rdf_namespaces(). However,
|
|
* if a module implements hook_rdf_mapping() and uses a prefix that is not
|
|
* defined in rdf_rdf_namespaces(), this hook should be used to define the new
|
|
* namespace prefix.
|
|
*
|
|
* @return
|
|
* An associative array of namespaces where the key is the namespace prefix
|
|
* and the value is the namespace URI.
|
|
*
|
|
* @ingroup rdf
|
|
*/
|
|
function hook_rdf_namespaces() {
|
|
return array(
|
|
'content' => 'http://purl.org/rss/1.0/modules/content/',
|
|
'dc' => 'http://purl.org/dc/terms/',
|
|
'foaf' => 'http://xmlns.com/foaf/0.1/',
|
|
'og' => 'http://ogp.me/ns#',
|
|
'rdfs' => 'http://www.w3.org/2000/01/rdf-schema#',
|
|
'sioc' => 'http://rdfs.org/sioc/ns#',
|
|
'sioct' => 'http://rdfs.org/sioc/types#',
|
|
'skos' => 'http://www.w3.org/2004/02/skos/core#',
|
|
'xsd' => 'http://www.w3.org/2001/XMLSchema#',
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @} End of "addtogroup hooks".
|
|
*/
|