Temporal binding for semantic queries
US8407242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2010 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Sep 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2477
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Described are techniques to facilitate temporal features in a semantic data store. Information about lifetimes of facts in a semantic store is maintained. Even when a fact is logically deleted, a physical record is kept available. The record of a logically deleted or invalid fact has associated lifetime information. For example, valid-from and valid-to time values. The record of a fact not yet deleted may have a valid-from time value indicating when it was created, became valid, etc. Queries against the semantic store may specify a timeslice (a point in time or a time range). The lifetime information can be used to satisfy such time-specific queries. Because records are maintained after they are logically deleted, it is also possible to accurately query a past state of the semantic store. Even if such a query is run at different times, same results may be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.