XML-based query languages are constructed to reach any arbitrary position within an XML document's "graph" using sequences of edge labels and delimiters representing a path.
基于XML的查询语言被构造来，使用表示路径的边标签和定界符序列达到XML文档图中的任意位置。
An access path graph not only describes the "operational details" of query execution, it also describes how the data flows.
访问路径图不但描述“操作细节”，而且描述数据如何流动。
The description of each operation includes a Query Tuner access path graph that explains its operational semantics.
每一个操作的描述都包括一个解释其操作语义的 Query Tuner 访问路径图。
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