This is because the path expression in the query targets only < company> elements that have no namespaces. 这是因为该查询中的路径表达式仅指向没有名称空间的元素。
Secondly, each path expression in the SQL/ XML query requires a separate namespace declaration. 其次,SQL/XML查询中的每个路径表达式需要一个单独的名称空间声明。
To do this simply, use a wildcard (*) in the path expression. 为了简单起见,可以在路径表达式中使用一个通配符。
Note that the brace expansion of the file path, not the full remote path expression, has been enclosed in double quotes. 请注意,文件路径中展开的大括号(不是完整的远程路径表达式)已用双引号括上。
P.get ( Person_. age) is a path expression. get(Person.age)是一个路径表达式。
A path expression is similar to a filesystem path. 路径表达式与文件系统路径相似。
A path expression is the result of navigation from a root expression via one or more persistent attribute ( s). 路径表达式是通过一个或多个持久化属性从根表达式进行导航得到的结果。
Whatever names they use, they all match the path expression based on their substitution group head element. 不管使用哪个名称,它们都匹配基于它们的代替组head元素的路径表达式。
PATH annotations are cumulative, meaning that a path expression following another path expression is appended to the preceding expression. @PATH注释是可以累积的,即,一个路径表达式后面的另一个路径表达式将附加到前面的表达式。
In many cases, it is possible to write a query by using either a FLWOR expression or a path expression. 在很多情况下,可以任意使用FLWOR表达式或路径表达式编写查询。
JET tags requiring a path expression have a select attribute. 需要路径表达式的JET标签有一个select属性。
Hence p.get ( Person_. age) denotes a path expression by navigating from the root expression p by the age attribute of Person. 因此,表达式p.get(Person.age)表示使用Person的age属性从根表达式p导航。
This example navigates from Account via two steps to create a path expression representing the name of an account's owner. 这个例子通过两个步骤从Account进行导航,创建一个表示帐户所有者的名称的路径。
Then it creates an in() expression with the path expression as input. 然后,它创建一个使用路径表达式作为输入的in()表达式。
Currently, the query technique that supports finite automaton Regular Path Expression ( RPE) is valuable in the research area of eXtensible Markup Language ( XML) query in semi-structured data mode. 基于自动机正则路径表达式查询技术是半结构化数据模式下XML查询研究领域颇有价值的方法。
Minimization of Path Expression Under Structural Integrity Constraints for XML XML结构完整性约束下的路径表达式的最小化
Query processing strategy of XML path expression based on schema 基于模式的XML路径表达式查询处理技术
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。
After introducing the current research of XML query and its optimization techniques in details, this paper makes an analysis on the characteristic of regular path expression based XML query techniques, pointing out several problems which need to be improved. 本文首先对国内外XML查询及其优化技术的研究现状进行了综述,然后分析了现有的基于正则路径表达式的XML查询技术的特点,指出了该技术研究中存在的一些有待完善的问题。
The paper presents a strategy that combines structure index and inverted lists and a querying algorithm based on joint path expression, which can effectively reduce the cost of practical execution and improve querying speed. 该文提出了一种结合结构索引、倒排表的策略、连接路径表达式的查询算法,有效地降低了实际执行的代价,提高了查询速度。
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。
It is concluded that path expression is a high-level synchronization mechanism suitable for the distributed environment. 结论是路径表达式是一种适合于分布式环境的高级同步机构。
Research and Implementation for XML Query Optimization Technology Based on Regular Path Expression 基于正则路径表达式的XML查询优化技术的研究与实现
Program path expression is an path representation method in path testing. 程序路径表达式是路径测试中路径的一种表示方法。
For efficiency rewrited path expression into SQL, the relation dictionary keeps every XML element's absolute path. 关系字典保存了每个元素的绝对路径,可以快速地把路径查询重写为结构化查询;
All of these query languages have a same feature, which is querying XML document by using path expression. 所有这些查询语言有个共同的特点,即通过路径表达式实现对XML文档的路径查询。
This algorithm can be converted to the corresponding path expression to the SQL statement. 该算法可将路径表达式转换为对应的SQL语句来处理。
The encoding saves each node path in a table and numbers it. In doing so, we avoid the structure connection for the former query algorithm. Moreover, the length of path expression and intermediate result set could not influence the query. 该编码将每一个结点的路径保存在一个表中,并将其路径编号,避免了以往查询算法的结构连接,且不受路径表达式长度和中间结果的影响。
Besides, it hardly supports the query for the expressions which contains much relative path expression and wildcard. 并且,对于含较多相对路径表达式以及含通配符的表达式查询支持有限。
As to the reverse axes in path expressions, this paper will present to rewrite the reverse axes, so that we can reduce the type of dealt axes and avail the estimates of path expression. 重点研究了路径表达式的处理,针对查询路径表达式自身存在的反向轴问题,为减少待处理轴的类型和实现快速估算查询代价,对反向轴进行重写。