AS 1484.13.3 pdf download

AS 1484.13.3 pdf download.IEEE Recommended Practice for Learning Technology—ISO 21000-2:2005 Information Technology—Multimedia Framework (MPEG-21)
1.1 Scope
This recommended practice specifies how the elements and attributes defined in ISO 21000-2:2005 Multimedia Framework—Part 2: Digital Item Declaration (MPEG-21 DID) relate to the components of the conceptual model for resource aggregation defined in IEEE Std 1484.13.1™-2012.
6. Conformance
Conformance to this recommended practice is discussed in 6.1, 6.2, 6.3, and 6.4. In this recommended practice, “shall” is to be interpreted as a requirement; “shall not” is to be interpreted as a prohibition, and “should” as a recommendation.6.1 Conforming aggregation instances A conforming aggregation instance shall be an instance of an aggregation format that should be modeled or described in terms of the MPEG-21 DID mapping ontology, either as a core ontology representation (mapped from an MPEG-21 DID instance to a core ontology representation) or as an MPEG-21 DID instance (mapped from a core ontology representation to an MPEG-21 DID instance) following the intentions of the MPEG-21 DID mapping ontology as expressed in Clause 7, Clause 8, and Clause 9 of this recommended practice. 6.2 Conforming bindings Conforming bindings of the MPEG-21 DID mapping ontology ⎯ Should conform to the requirements of Clause 7, Clause 8, and Clause 9 of this recommended practice. ⎯ If the binding technology language supports Uniform Resource Identifiers (URIs), then it shall use the same URIs as those in the Terse RDF Triple Language (Turtle) representation referenced in Annex D of this recommended practice. If the binding technology language supports Uniform Resource Identifiers (URIs) and the binding contains extensions to the MPEG-21 DID mapping ontology (see 6.4), then identifiers for the extensions shall be defined in a new namespace. 6.3 Conforming extensions of the MPEG-21 DID mapping ontology The MPEG-21 DID mapping ontology may be extended for a conformant MPEG-21 DID aggregation format extension that relates to interpreting externalized representations of digital aggregations by adding a new class or property and defining a new identifier in a new mapping ontology. The new identifier shall not be used to identify a concept that already exists in the MPEG-21 DID mapping ontology. Bindings for conforming extensions shall conform to the requirements in 6.2. NOTE—Concepts relating to interpreting externalized representations of digital aggregations should be defined as conforming extensions to the MPEG-21 DID mapping ontology. 6.4 Conforming transforming implementations A conforming transforming implementation should implement a transformation from the MPEG-21 DID aggregation format to the core ontology and its identifiers or from the core ontology and its identifiers to the MPEG-21 DID aggregation format by following the intention of the MPEG-21 DID mapping ontology as defined in classes in Clause 7, Clause 8, and Clause 9 of this recommended practice.
7. MPEG-21 DID mapping ontology—classes
This clause provides declarations of all the classes in the MPEG-21 DID mapping ontology. The declarations use the following format: ⎯ Class name: The name of the class in the MPEG-21 DID mapping ontology. ⎯ Mapped from: A RAMLET-allocated identifier representing the name (including capitalization) of the element or attribute in the MPEG-21 DID aggregation format. This identifier is expressed as a Uniform Resource Identifier (URI), which may not resolve at the fragment level. ⎯ Maps: A description of the elements or attributes mapped from the MPEG-21 DID aggregation format. ⎯ Mapped to: The core ontology class to which the MPEG-21 DID mapping ontology class maps. (See IEEE Std 1484.13.1-2012.) ⎯ Scope note: A textual description of the class. Scope notes are reproduced directly from the descriptions of the MPEG elements and attributes in ISO/IEC 21000-2:2005. For additional clarification of any of the terms in the scope notes please consult ISO/IEC 21000-2:2005. ⎯ Data type: The data type of the MPEG-21 DID mapping ontology class as defined in Clause 9. ⎯ Properties: The properties of the MPEG-21 DID mapping ontology class as defined in Clause 8. Inherited properties are not included in the entry. ⎯ Asserted conditions: Any conditions that are asserted for the MPEG-21 DID mapping ontology class as a result of its properties.