XML_RDDL::getResourcesByPurpose() -- selects all resources of a specified nature
Описание
Gets all resources of a given purpose from an RDDL document. You have to call
XML_RDDL::parseRDDL()
first. The purpose of a resource is specified by the 'xlink:arcrole' attribute.
The purpose of a resource link determines what the link will be used for. Frequently the purpose
of a link can be determined from the nature of the referenced resource. For example the purpose
of an XML Schema is typically schema validation, yet a schema may be comprised of a number of
included modules and even when included modules are themselves an XML Schema, the purpose is as a module.
You can find a list of well known purposes at
http://www.rddl.org/purposes/.
Возвращаемое значение
array array containing all resources with the specified purpose.
Заметка
Эта функция не должна вызываться статически.
Usage example
Пример 64-1. Getting all normative references
<?php
require_once "XML/RDDL.php";
// create new parser
$rddl = &new XML_RDDL();
// parse a document that contains RDDL resources
$result = $rddl->parseRDDL('http://www.rddl.org');
// check for error
if (PEAR::isError($result)) {
echo sprintf( "ERROR: %s (code %d)", $result->getMessage(), $result->getCode());
exit;
}
// get all normative references
$ref = $rddl->getResourcesByPurpose('http://www.rddl.org/purposes#normative-reference');
echo "<pre>";
print_r($ref);
echo "</pre>";
?>
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