"Digital Item Declaration Language"@en . . "Digital Item Declaration Language (DIDL) is an XML dialect standardized in MPEG-21. It is used by devices implementing the Universal Plug and Play (UPnP) AV standard."@en . "Digital Item Declaration Language (DIDL) is an XML dialect standardized in MPEG-21. It is used by devices implementing the Universal Plug and Play (UPnP) AV standard."@en . . . . .