AlkantarClanX12
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<?php
/**
* @file
* Provides info about book nodes.
*/
/**
* Implements hook_entity_property_info_alter() on top of book module.
*
* @see entity_entity_property_info_alter()
*/
function entity_metadata_book_entity_property_info_alter(&$info) {
// Add meta-data about the added node properties.
$properties = &$info['node']['properties'];
$properties['book'] = array(
'label' => t("Book"),
'type' => 'node',
'description' => t("If part of a book, the book to which this book page belongs."),
'getter callback' => 'entity_metadata_book_get_properties',
);
$properties['book_ancestors'] = array(
'label' => t("Book ancestors"),
'type' => 'list<node>',
'computed' => TRUE,
'description' => t("If part of a book, a list of all book pages upwards in the book hierarchy."),
'getter callback' => 'entity_metadata_book_get_properties',
);
}