Download Advanced Applications and Structures in Xml Processing: by Changqing Li, Tok Wang Ling PDF

By Changqing Li, Tok Wang Ling

Purposes and constructions in XML Processing: Label Streams, Semantics usage and information question applied sciences displays the numerous examine effects and most up-to-date findings of students' around the world, operating to discover and extend the function of XML. This assortment represents an figuring out of XML processing applied sciences in reference to either complicated purposes and the newest XML processing applied sciences that's of basic significance. It presents the chance to appreciate issues intimately and become aware of XML learn at a accomplished point.

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Read or Download Advanced Applications and Structures in Xml Processing: Label Streams, Semantics Utilization and Data Query Technologies (Premier Reference Source) PDF

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A path expression defines a tree pattern that is matched against the XML tree and specifies nodes that need to be returned as results. As an example, the path expression //book[author/last = “Stevens”] [price < 100] finds all books written by Stevens with the book price less than 100. Path expressions have three types of constraints: the tag name constraints, the structural relationship constraints, and the value constraints. They correspond to the name tests, axes, and value comparisons in the path expression, respectively.

Compute the bisimulation graph of the XML tree. b. Enumerate all subgraphs of depth k (indexable units) in the data bisimulation graph, and compute their features. The reason to put a limit on the depth is that otherwise there are too many indexable units. c. Insert indexable units based on their distinctive features into a B+ tree. At the query execution time: a. Compute the bisimulation graph of the query tree. b. If the depth of the bisimulation graph is not greater than k, then calculate the features of query bisimulation graph; otherwise, the index cannot be used.

Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. XML Data Management in Object Relational Database Systems update techniques for each form have been studied extensively. A second aspect is to provide capabilities to facilitate interoperability between the Relational and XML data models. The SQL/XML standard plays a key role in this by providing users complete relational and XML duality - the capability of generating XML from relational data so that XQuery/XPath/XSLT can be used to query relational data, the capability of providing relational access over XML data so that SQL can be used to query XML data, and the capability of embedding XQuery/XSLT and SQL in each other to query and update both XML and relational data together.

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