The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 2009
Filed:
Sep. 16, 2004
Ashish Thusoo, Foster City, CA (US);
Ravi Murthy, Fremont, CA (US);
Sivasankaran Chandrasekar, Palo Alto, CA (US);
Eric Sedlar, San Francisco, CA (US);
Nipun Agarwal, Santa Clara, CA (US);
Ashish Thusoo, Foster City, CA (US);
Ravi Murthy, Fremont, CA (US);
Sivasankaran Chandrasekar, Palo Alto, CA (US);
Eric Sedlar, San Francisco, CA (US);
Nipun Agarwal, Santa Clara, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
An XPath expression is converted into a tree-based representation where each node represents an operation to be performed and the links between nodes in the tree represent the flow of data between operations. The conversion may involve creating a parse tree for the XPath expression, and then converting the parse tree into an operator tree. The operator tree is constructed in such a way that execution of the XPath expression begins at the leaf nodes of the operator tree, and the results are then passed up the tree. After each node is executed, the results are either (1) passed to a filter that filters the results with a predicate statement or (2) passed to another node to be operated upon. This occurs until no nodes remain to be executed.