XPath evaluation in an XML repository

摘要

XPath evaluation in an XML data repository includes parsing an input XPath query using a simple path file to generate an execution tree about the XPath query, where the simple path file includes an XML file that is generated based on the hierarchical architecture of a plurality of XML files in the data repository, and the names of the nodes in the generated XML file are generated by recording the tag information of respective nodes in the plurality of XML files in the data repository. Execution of an execution tree for the data repository generates a final evaluation result.

主权项

1. A method for XPath evaluation in an XML data repository, comprising:
generating, via a hardware unit, a simple path file comprising an XML file by merging nodes of hierarchical architectures of a plurality of XML files in the data repository to form a hierarchical architecture, the simple path file including a tree-like structure for the hierarchical architecture comprising nodes corresponding to storage blocks in the data repository that store data from the plurality of XML files, each of at least one node in the hierarchical architecture of the simple path file corresponding to a plurality of nodes with at least two of the plurality of nodes from different ones of the plurality of XML files, and node names of nodes in the generated XML file are generated by recording tag information of respective nodes in the plurality of XML files in the data repository; storing data in the data repository in an orderly manner according to each node in the hierarchical architecture of the simple path file; parsing an input XPath query, via a hardware unit, by applying the XPath query to the hierarchical architecture of the simple path file to generate an execution tree for the XPath query, wherein the execution tree includes a tree-like structure with nodes including identifiers referencing nodes in the hierarchical architecture of the simple path file for obtaining data; and executing the execution tree for the data repository, via a hardware unit, to generate a final evaluation result by retrieving data of the plurality of XML files from the storage blocks in the data repository corresponding to the nodes of the hierarchical architecture of the simple path file referenced by the execution tree and combining the retrieved data to produce the final evaluation result.