cxm造句

• In order to maximize semantic power of xml specifications , the main ideas on integrity constraints for xml documents and the problems related to them are described and discussed . then we proposel a contrainted xml data model ( cxm ) , and make some extensions and standardizations on xml - ql
  首先探讨了xml数据的完整性约束及相关问题，在此基础上提出了一个支持完整性约束的xml数据模型cxm ；然后对目前流行的查询语言xml - ql做了相应的改进和规范化，使其更适合于xml数据的查询。