Graphically mapping XML elements or attributes to relational columns in DB2 automatically annotates the XML schema document.
以图形化方式将XML元素或属性映射到DB 2中的关系列，就会自动地在XML模式文档中加上注释。
Mapping XML data to the relational model is not a trivial task (maybe one of the reasons for the variety of mapping solutions in the market).
将XML数据映射到关系模型不是一件普通的任务(这也许就是市场上存在多种映射解决方案的原因之一)。
These have many similarities to the document model approaches, but they go a step further by mapping XML documents into actual application data structures.
这些方法与文档模型的方法有许多相似处，但是它们更进一步将XML文档映射到实际应用程序数据结构中。
The z/OS workload management service class, under which optimized local adapter EJB requests are dispatched, can be configured using the workload management transaction class mapping XML file.
可以使用工作负荷管理事务类映射XML文件配置z/OS 工作负荷管理服务类，在该类下调度优化的本地适配器EJB请求。
However, due to the mismatch between the XML's tree structure and flat relational tables, mapping XML document to relational database is an involved problem. So it becomes a pop research direction.
然而由于复杂的树形XML文档和简单平坦的关系型数据库表结构之间固有的不匹配，使得XML到关系型数据库的映射实现十分困难，因此成为当前的一个热门研究课题。
However, due to the mismatch between the XML's tree structure and flat relational tables, mapping XML document to relational database is an involved problem. So it becomes a pop research direction.
然而由于复杂的树形XML文档和简单平坦的关系型数据库表结构之间固有的不匹配，使得XML到关系型数据库的映射实现十分困难，因此成为当前的一个热门研究课题。
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