===== The Element ===== ==== Definition and Usage ==== The [[descriptorbase|]] element groups a set of [[descriptor|]] elements, each of which defines initial values of [[media|]] properties. ==== Syntax ==== ^ Element ^ Attributes ^ Content ^ Parent ^ | [[descriptorbase|]] | //id// | ([[importbase|]] | [[descriptor|]] | [[descriptorswitch|]])+ | [[head|]] | ==== Attributes ==== ^ Name ^ Value ^ Description ^ | //id// | It may receive any string value that begins with a letter or an underscore and that only contains letters, digits, <".">, and <"_">. | The //id// attribute uniquely identifies the element within a document. |