信息技术.元对象程序(MOF

[中文适用范围]： 本国际标准规定了以下内容：a. 用于指定、构建和管理技术中立元模型的抽象语言：元模型实际上是某种元数据的抽象语言。b. 用于实现存储库和集成框架（例如，工具集成框架）的框架，这些框架保存由元模型描述的元数据（例如，模型），并使用标准技术映射将 MOF 元模型转换为元数据 API。本国际标准还提供以下内容：a. MOF 元模型的正式定义；即用于指定 MOF 元模型的抽象语言。b. 从任意 MOF 元模型到 CORBA IDL 的映射，可生成用于管理任何类型元数据的 IDL 接口。c. 一组“反射”CORBA IDL 接口，用于管理独立于元模型的元数据。d. 一组用于表示和管理 MOF 元模型的 CORBA IDL 接口。e. 用于 MOF 元模型交换的 XMI 格式（OMG XMI 规范）。 [外文原描述]： ISO/IEC 19502:2005 defines a metamodel (defined using Meta Object Facility, MOF), a set of interfaces [defined using Open Distributed Processing (ODP) Interface Definition Language (IDL) (ITU-T Recommendation X.920 (1997) | ISO/IEC 14750:1999)], that can be used to define and manipulate a set of interoperable metamodels and their corresponding models. ISO/IEC 19502:2005 also defines the mapping from MOF to ODP IDL. These interoperable metamodels include the Unified Modeling Language (UML) metamodel (ISO/IEC 19501:2005), the MOF meta-metamodel, as well as future standard technologies that will be specified using metamodels. The MOF provides the infrastructure for implementing design and reuse repositories, application development tool frameworks, etc. The MOF specifies precise mapping rules that enable the CORBA interfaces for metamodels to be generated automatically, thus encouraging consistency in manipulating metadata in all phases of the distributed application development cycle. Mappings from MOF to W3C XML and XSD are specified in ISO/IEC 19503. Mappings from MOF to Java (TM) are in the JMI (Java Metadata Interchange) specification defined by the Java Community Process. ISO/IEC 19502:2005 specifies an abstract language for specifying, constructing, and managing technology neutral metamodels (a metamodel is in effect an abstract language for some kind of metadata);a framework for implementing repositories and integration frameworks (e.g., tool integration frameworks) that hold metadata (e.g., models) described by the metamodels and which uses standard technology mappings to transform MOF metamodels into metadata APIs. ISO/IEC 19502:2005 also provides a formal definition of the MOF meta-metamodel, i.e. the abstract language for specifying MOF metamodels;a mapping from arbitrary MOF metamodels to CORBA IDL that produces IDL interfaces for managing any kind of metadata;a set of 'reflective' CORBA IDL interfaces for managing metadata independent of the metamodel;a set of CORBA IDL interfaces for representing and managing MOF metamodels; an XMI format for MOF metamodel interchange (OMG XMI specification).