·2,447,543篇论文数据，部分数据来源于NoteExpress
AXIOM provides a virtual document model it expands on demand, building only as much of the tree structure document model representation as has been requested by the client application.
AXIOM提供了一种可以按需扩展的虚拟文档模型，仅构建客户端应用程序所请求的树结构文档模型表示。
Learn to use the document Object Model (DOM), a tree API that provides direct access to parts of an XML document.
学习使用文档对象模型(Document Object Model, DOM)，使用这种树api可以直接访问XML文档的各个部分。
Since the user is not using a tree-based object model to access this part of the document, constructing the entire tree would lead to a waste of memory due to replication of data.
因为用户不使用基于树的对象模型来访问这部分文档，所以构造完整的树会因为数据重复而浪费内存。
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