Annotation Framework

Abstract

A fact repository contains facts having attributes and values and further having associated annotations, which are used, among other things, to vet facts in the repository and which can be returned in response to a query.

1 . A method for screening facts in a fact repository, performed at a computer system having one or more processors and memory storing one or more programs for execution by the one or more processors, the method comprising:
 identifying a first fact of a first object in the fact repository, the first fact having a fact attribute and a fact value, wherein the fact repository includes a plurality of facts associated with objects, wherein a respective fact in the fact repository includes a respective fact attribute and a respective fact value, wherein the respective fact value is a text string, and wherein the plurality of facts is extracted from a plurality of documents;   identifying an annotation for a second fact of the first object, wherein the annotation for the second fact includes additional information about the second fact, and a value of the annotation for the second fact is indexed to a substring of a fact value of the second fact; and   removing the first fact from the fact repository when the fact value of the first fact does not correspond to the value of the annotation for the second fact.