System and method of XML query processing
US7512592B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 2, 2004 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Nov 2, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99943
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of processing queries, e.g., XPath expressions, related to an XML document includes generating a plurality of tokens based on the contents of the XML document. At least one query expression is compiled to a first plurality of query nodes defining a tree. A plurality of lookup tables may be configured to relate each of the first plurality of query nodes by a symbol. Each token is processed by looking up the query nodes indexed by a symbol matching the token in one of the plurality of lookup tables, marking each of the related query nodes, and indicating a match if each of the first plurality of query nodes of the at least one query expression is marked. A system for performing the method includes a tokenizer, an expression compiler, and an engine module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.