信息技术.文献模式定义语言(DSDL).第8部分:文献语义重新命名语言(DSRL)

[中文适用范围]： 本部分规定了允许用户为 XML 元素、属性、实体和 processing instruction（处理指令）分配本地有意义的名称的机制，而无需完全重写用于验证的 DTD 或模式。此外，本部分提供了一种基于 XML 的格式来声明实体引用的替换文本，并提供了一种允许用户为元素内容和属性值定义默认值的机制。 [外文原描述]： ISO/IEC 19757-8:2008 specifies a mechanism that allows users to assign locally meaningful names to XML elements, attributes, entities and processing instructions, without having to completely rewrite the Document Type Definition (DTD) or schema against which they are to be validated. In addition, ISO/IEC 19757-8:2008 provides an XML-based format for declaring the replacement text for entity references and provides a mechanism that allows users to define default values for both element content and attribute values.