ISO/IEC 21000-5:2004/Amd 3:2008 PDF

Overview

ISO/IEC 21000-5:2004/Amd 3:2008 is an amendment to ISO/IEC 21000-5 (MPEG‑21 Part 5: Rights Expression Language - REL) that defines the OAC (Open Access Content) profile and a new multimedia extension (multimedia extension three, namespace urn:mpeg:mpeg21:2006:01-REL-M3X-NS). The amendment adds XML schema elements, attributes and semantics to the REL to support open-access licensing patterns - for example, free use and derivative works with required copyright notices and source‑code/reference obligations.

Key topics and technical requirements

• Multimedia extension three (m3x): introduces new REL right and condition elements under the normative namespace urn:mpeg:mpeg21:2006:01-REL-M3X-NS. Prefix m3x is used in examples.
• New right: m3x:governedAdapt
  • Represents the right to adapt a resource.
  • Optional attribute @m3x:governanceRule (QName) points to governance rules that determine adaptation constraints (e.g., adapt once).
  • If absent, adaptation results in a license for the adapted resource equal to the original license.
• New conditions
  • m3x:copyrightNotice - requires showing or inserting copyright information; optional @m3x:noticeType indicates how to present the notice (e.g., show before exercise).
  • m3x:nonCommercialUse - signals non‑commercial use; optional @m3x:noticeType for presentation rules.
  • m3x:sourceCode - requires that adapted works include the original resource or a pointer to it (source or accessible location).
• OAC profile restrictions
  • An r:license is limited to r:grant and r:issuer elements.
  • Supported principals: r:keyHolder, m1x:identityHolder.
  • Supported rights: mx:adapt, mx:execute, mx:play, mx:print, m1x:governedCopy, m3x:governedAdapt.
  • Supported resources: r:nonSecureIndirect and r:secureIndirect references; supports r:allConditions containing sx:territory, m3x conditions, etc.
  • Profile compliance: indicated via @sx:profileCompliance and values referencing the REL multimedia extension namespace.
• Security and binding: r:issuer may include dsig:Signature and r:keyHolder (dsig:KeyInfoType) to bind license to issuer and content (secureIndirect can include a hash).

Practical applications

• Implementing machine‑readable open‑access licenses for digital publishing, news, academic repositories and multimedia platforms.
• Enabling interoperable rights expressions for content distribution systems and lightweight DRM that allow adaptation and derivative works while enforcing notices and source‑linking.
• Integrating with content ingestion pipelines, rendering applications, and rights‑management services to automatically enforce license conditions (show copyright, restrict commercial use, include source references).

Who would use this standard

• Standards implementers, DRM and content‑platform engineers, digital library architects, publishers, repository managers, and software developers building REL-aware applications or metadata processors that require consistent, interoperable open‑access licensing behavior.

Related standards

• ISO/IEC 21000 (MPEG‑21) family - Part 5: Rights Expression Language (REL).
• XML Digital Signature and XML Encryption (used for dsig and xenc bindings referenced in the amendment).