Because a logical or physical model is an abstraction of the real-world system, it is usually very complicated, and it consists of many buildingblocks and relationships.
由于逻辑或物理模型是现实中的系统的抽象,它通常非常复杂,由很多构建块和关系组成。
2
The NIEM XML data model provides buildingblocks for common objects.
NIEM XML数据模型提供公共对象的构造块。
3
The most elemental buildingblocks for the Registry and Repository content model are service metadata artifact documents (physical documents), such as XSD or WSDL files.
Registry and Repository内容模型的最基本构建块是服务元数据构件文档(物理文档),如xsd或wsdl文件。