The relax ng compact syntax provides a much less verbose , and easier to read , format for describing the same semantic constraints as relax ng xml syntax Relax ng紧凑语法提供了一种格式用于描述与relax ng xml语法相同的语义约束，这种格式更简洁、更易于阅读。
Since xml does not mandate any particular storage technique , it can be used as a common interchange format among systems that store data in file systems , relational databases , object repositories , and many other storage formats 由于xml没有规定任何特定的存储技术，所以它可作为通用交换格式用于各种系统中，而这些系统可在文件系统、关系数据库、对象仓库以及许多其他的存储格式中存储数据。
Thesaurus should be coded with xml while classification should follow is02788 and iso5964 . marc can be converted to xml / rdf . http will continue to play the main role on the protocol level while z39 . 50 can be used to construct thesaurus database with zthes profile Xml格式用于处理和交换叙词表信息，用marc格式来表示分类法，并建立marc和xml rdf的转换机制。受控语言在协议层以http协议为主， z39 . 50协议通过zthes扩展构建叙词数据库， whois + +协议的检索路由实现整合检索。
