Efficient storage and retrieval of posting lists
US8229970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2008 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Dec 11, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/322
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A role tree having nodes corresponding to semantic roles in a hierarchy is defined. A posting list is generated for each association of a term and a semantic role in the hierarchy. The posting lists are stored contiguously on a physical storage medium such that a subtree of the hierarchy of semantic roles can be loaded from the storage medium as a single contiguous block. The posting lists for a subtree of the hierarchy are retrieved by obtaining data identifying the beginning location on the physical storage medium of the posting lists for the term at the top of a desired subtree of the hierarchy and data identifying the length of the posting lists of the desired subtree of the hierarchy. A single contiguous block that includes the posting lists for the desired subtree of the hierarchy is then retrieved from the beginning location through the specified length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.