Sparqlator

Description

It is a wrapper to call the GraphFinder::sparqlator method, using the OKBQA framework API.

It takes a template and a disambiguation structures which are produced by a template generation and a disambiguation modules, respectively, and produces a set of SPARQL queries which are supposed to represent the same query need represented by the template and disambiguation.

Optionally, the parameter, max_hop may be set to specify the number of maximum hops for each path to be extended to. As it is to specify an integer value (between 1 and 3, usually), it may be simply encoded in the URL (see Web service URL example below).

GraphFinder implements the triple variation operations proposed by [1].

Scope and limit

The current version implements only the three operations, inversion, split, and instantiation, among the four proposed in [1]. Implementation of the last one, join is remained as a future work.

Language dependency

GraphFinder is language-independent, and so does the sparqlator module.

References

1. Jin-Dong Kim and Kevin Bretonnel Cohen, “Triple Pattern Variation Operations for Flexible Graph Search”, Proceedings of the 1st international workshop on Natural Language Interfaces for Web of Data (NLIWoD), 2014.