第5章 集合类(Collections)映射 目录 持久化集合类(Persistent Collections) 映射集合 ( Mapping a Collection ) 值集合和多对多关联(Collections of Values and Many-To-Many Associations) 一对多关联(One-To-Many Ass..
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This requires a fixed mapping from the expected XML structure to a collection of relational tables in your database schema.
这需要从预期的XML结构到数据库模式中的关系表集合的固定映射。
While mapping an author element to an author instance isn't too bad, there's not grouping element, like authors, that makes it clear that each author belongs to a single collection in a Book instance.
尽管把一个author元素映射到一个author实例没什么问题，但是没有分组元素，比如authors，它清楚地显示出所有作者属于Book实例中的一个集合。
XPathQueryService: Allows you to use XPath to query a collection or resource, including methods for namespace mapping and for query execution.
XPathQueryService：允许使用 XPath 查询集合或资源，包括用于名称空间映射和查询执行的方法。
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