15. The method of claim 11 , the identifying of the one or more sets of conceptually similar terms for the at least one graph term further comprising: identifying the one or more sets of conceptually similar terms using the one or more onomasticons.
11. A method comprising: determining a plurality of documents that satisfy a search query expressed as a query conceptual graph; performing the following for each document of the plurality of documents to identify one or more sets of conceptually similar terms for the each document: generating a document conceptual graph for each document, the document conceptual graph comprising: a plurality of graph terms, a graph term representing a concept type; a plurality of conceptual relation nodes that each comprise text describing a relationship between two or more of the plurality of graph terms; and a plurality of arcs that each indicate a direction of the relationship described by the text of a corresponding conceptual relation node of the plurality of conceptual relation nodes; and identifying one or more sets of conceptually similar terms for at least one graph term of the document conceptual graph, the one or more sets of conceptually similar terms mapped to the concept type represented by the at least one graph term; selecting at least one document from the plurality of documents as a potential match to the search query if, when the query conceptual graph is compared to a document conceptual graph for the document, there is at least one corresponding term associated with the query conceptual graph that matches at least one corresponding term associated with the document conceptual graph, wherein the corresponding term associated with each respective conceptual graph comprises at least one or more of: terms representing a concept type, and terms that are conceptually similar to the terms representing concept types; accessing one or more onomasticons, each onomasticon comprising a list of one or more mappings, each mapping comprising a mapping of a predetermined concept type to a corresponding set of conceptually similar terms; and validating that the potential match is a valid match if a set of conceptually similar terms of the query conceptual graph, and a set of conceptually similar terms of the document conceptual graph that is associated with the potentially matching document, maps to the same concept type in one or more onomasticons.