ISO/IEC 15938-5:2003/Amd 2:2005
(Amendment)Information technology — Multimedia content description interface — Part 5: Multimedia description schemes — Amendment 2: Multimedia description schemes user preference extensions
Information technology — Multimedia content description interface — Part 5: Multimedia description schemes — Amendment 2: Multimedia description schemes user preference extensions
Technologies de l'information — Interface de description du contenu multimédia — Partie 5: Schémas de description multimédia — Amendement 2: Extensions de préférence d'utilisateur des schémas de description multimédia
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Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 15938-5
First edition
2003-05-15
AMENDMENT 2
2005-02-15
Information technology — Multimedia
content description interface —
Part 5:
Multimedia description schemes
AMENDMENT 2: Multimedia description
schemes user preference extensions
Technologies de l'information — Interface de description du contenu
multimédia —
Partie 5: Schémas de description multimédia
AMENDEMENT 2: Extensions de préférence d'utilisateur des schémas
de description multimédia
Reference number
ISO/IEC 15938-5:2003/Amd.2:2005(E)
©
ISO/IEC 2005
ISO/IEC 15938-5:2003/Amd.2:2005(E)
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ii © ISO/IEC 2005 – All rights reserved
ISO/IEC 15938-5:2003/Amd.2:2005(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 2 to ISO/IEC 15938-5:2003 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information.
© ISO/IEC 2005 – All rights reserved iii
ISO/IEC 15938-5:2003/Amd.2:2005(E)
Information technology — Multimedia content description
interface —
Part 5:
Multimedia description schemes
AMENDMENT 2: Multimedia description schemes user preference
extensions
Except where noted otherwise, add the corresponding subclauses of ISO/IEC 15938-5:2003 with the content
of the following subclauses hereafter:
6.5.7 LogicalUnitLocator datatype
6.5.7.1 Introduction
The locating of nested units is supported by defining an explicit structure to the LogicalUnitLocator that
allows media locators to be included as sub-units. Furthermore, by supporting hierarchical structures directly
through this nesting, the LogicalUnitLocator retains a clear semantics when multiple locators are
sequenced within a description to identify the union of logical units.
6.5.7.2 LogicalUnitLocator datatype syntax
Syntax of the LogicalUnitLocatorType:
use="required"/>
© ISO/IEC 2005 – All rights reserved 1
ISO/IEC 15938-5:2003/Amd.2:2005(E)
6.5.7.3 LogicalUnitLocator datatype semantics
Semantics of the LogicalUnitLocatorType:
Name Definition
LogicalUnitLocatorType
Describes the location of logical unit of a media resource, such as a “track”
of a CD or “chapter” of a DVD. The localization within a target resource
can be specified using either LogicalUnit or ReferenceUnit
elements. In the case that multiple instances of these elements are
included within the description, the result is the union of the individual
locator elements, e.g., chapter 1 and chapter 2 of a DVD. Nested logical
units should be described using the SubUnit elements of each locator
element.
LogicalUnit Describes the localization of a logical unit by identifying the name of the
logical unit, e.g., “chapter” and value, e.g., “2”.
unit
Identifies the unit, e.g., “chapter” using termReferenceType. The unit
name can belong to a classification scheme in order to enforce a
controlled vocabulary. The termReferenceType also allows names to
be used that do not belong to classification schemes when needed.
value
Describes the value of the unit, e.g., “2” using string.
SubUnit
Describes nested units located within the parent logical unit, e.g., “section
2” of “chapter 1”. SubUnit is of type MediaLocator to allow non-logical
sub-units to be described.
ReferenceUnit
Describes the localization of a logical unit by identifying reference of the
logical unit, such as by xpath expression.
referenceGrp
Identifies the reference of the logical unit using xpath, idref, etc.
6.5.7.4 Example (informative)
The following example describes the logical unit of a “chapter” of a DVD. This example assumes that a
classification scheme “urn:dvd:logicalunit” has been defined for DVDs that identifies the names of its logical
units, e.g., “chapter”.
2 © ISO/IEC 2005 – All rights reserved
ISO/IEC 15938-5:2003/Amd.2:2005(E)
The following example describes the logical unit of a CD that corresponds to track 8 from disk 2. This example
assumes that a classification scheme has been defined for CDs that identifies the names of its logical units.
Furthermore, this example shows the explicit use of hierarchy of units to indicate that the track is from disk 2.
The LogicalUnitLocator describes the increasing granularity and nesting of logical units in the case of
hierarchical relationship using the SubUnit element.
The following example uses the ReferenceUnit xpath reference mechanism of LogicalUnitLocator
to address a fragment of an XML resource.
The following example uses the ReferenceUnit xpath reference mechanism of LogicalUnitLocator
to address a fragment of an XML resource.
© ISO/IEC 2005 – All rights reserved 3
ISO/IEC 15938-5:2003/Amd.2:2005(E)
The following example describes a fragment that corresponds to a time point at 30 seconds from the
beginning of the third track of an Audio CD.
The following example describes the first 15 seconds of all the audio tracks of the second CD disk in a three
disk CD Audio package.
Except where noted otherwise, replace the corresponding subclauses of ISO/IEC 15938-5:2003 with the
content of the following subclauses hereafter:
7.5.3.2 Person DS syntax
type="mpeg7:ControlledTermUseType"/>
type="mpeg7:OrganizationType"/>
type="mpeg7:ReferenceType"/>
type="mpeg7:PersonGroupType"/>
type="mpeg7:ReferenceType"/>
minOccurs="0" maxOccurs="unbounded"/>
type="mpeg7:ElectronicAddressType"
minOccurs="0" maxOccurs="unbounded"/>
minOccurs="0"/>
...
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