信息技术.多媒体框架(MPEG-21).第21部分:媒体契约本体

[中文适用范围]： ISO/IEC 21000 的这一部分指定了一个本体，用于表示为 MPEG-21 数字项目或与 MPEG-21 框架相关的服务的交易而形成的多媒体框架中的合同。 媒体合同本体 (MCO) 旨在以数字方式表达在 ISO/IEC 21000 使用环境中达成的协议，这些合同涉及包装为数字项目的内容交易以及围绕该内容提供的服务，通过语义表示。 [外文原描述]： ISO/IEC 21000-21:2013 specifies MPEG-21 Media Contract Ontology (MCO). The MCO may be used to represent contracts for content directly or for services on content based on MPEG-21 technologies. This is implemented by using some of the classes and properties defined in ISO/IEC 21000-19 (Media Value Chain Ontology) and by extending its ontology. Media Contract Ontology is able to represent the most common rights in contracts in the media field and the conditions appearing the most in those documents. It is made of a contract core ontology, for implementing the most general entities, and of an extension including specific elements to address the most relevant information found in contracts for permitting the exploitation of intellectual property rights. A mechanism for defining further future extensions is in place. A contract expressed with MCO may provide: the identification of the contract itself; possible relationships with other contracts; the parties; a textual version of the contract; the object of the contract (content or service); the deontic-expression (permissions, obligations, prohibitions), with possible reference to textual clauses. There is support for: encryption of the whole contract or any sub-part of it; inclusion of metadata to be associated to contract entities, as annotation properties. A document instance created according to MCO specification can be: a contract template; a contract offer; a signed contract (binding the parties). The MCO can also be used for representing: exploitation contexts (as deontic expressions); rights situation related to specified content or service, also derived from multiple contracts; any subset of knowledge about rights on content or service.