A path expression, on the other hand, navigates through a hierarchy of XML elements and returns the elements that are found at the end of the path.
而路径表达式则可以在分层的xml元素之间进行导航，并返回在路径末端找到的元素。
Node is an XPath 1.0 expression that identifies the schema node to which the given binding declaration is associated (see XML Path Language for detailed XPath description).
node是一个XPath 1.0表达式，它指定与给定的绑定声明相关联的模式节点(对XPath的详细说明参见XML PathLanguage)。
The first step of the path expression calls the db2-fn: xmlcolumn function to obtain a list of XML documents from the CONTACTINFO column of the CLIENTS table.
路径表达式的第一步调用db 2 - fn：xmlcolumn函数从clients表的contactinfo列获得一个xml文档的列表。
This paper focuses on the query language of XML data, the technologies of path expression optimizing and the query processing of XML data.
本文主要对XML数据库的查询语言、XML数据路径表达式查询的优化技术和XML数据的查询处理技术进行了重点研究。
Navigating XML queries by path expression is the common characteristic of XML query languages.
利用路径表达式导航XML查询是XML查询语言的共同特点。
At first, an algorithm is proposed, which rewrites a regular path expression based XML query as a group of simple path expression based queries using mapping information (mapping graph).
首先提出了一个利用映射信息(映射图)将带正则路径表达式的XML查询重写为一组简单路径查询的算法。
XML query includes content query and structural query. The query condition can be represented as a simple path expression (SPE) or a regular path expression (RPE).
XML查询包含内容查询和结构查询，其查询条件可表示为简单路径表达式(SPE)和正则路径路径表达式(RPE)。
Path expression is one of the core components of most XML query languages. However, there are few researches on the issue of path expression optimization.
路径表达式是XML数据查询语言的核心部分，但是目前针对路径表达式本身进行优化的研究却相对较少。
In this paper, we make some researches on the XML query structure and analyze the optimization policy in logical optimization. How to optimize the path expression is discussed primarily in this paper.
本文介绍了XML查询的查询处理结构，分析了逻辑优化的常规策略，重点研究了如何针对路径表达式进行优化。
Path expression is a common feature of XML query languages. Many indexing methods have been proposed.
路径查询是XML查询的一个主要特征，现已提出了多种XML索引方法。
Path expression is a common feature of XML query languages. Many indexing methods have been proposed.
路径查询是XML查询的一个主要特征，现已提出了多种XML索引方法。
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