1. A computer-implemented method of linking a first ontology to a second ontology in an intelligent services engine, the method comprising: retrieving the first ontology comprising at least one subsumption mapping configured to indicate a hierarchical relationship of a concept; retrieving the second ontology comprising category information and at least one category wherein the concept in the first ontology is logically related to the at least one concept; and creating a mapping relationship between the concept of the first ontology to the at least one category of the second ontology.