Abstract: Systems and methods are disclosed to search for data responsive to first and second query concepts by generating a first expanded set of results from the first query concept; generating a second expanded set of results from the second query concept; determining an intersecting set of documents from the first and second expanded sets of results; and determining an explanation of a relationship for each document in the intersecting set of documents for each of the first and second query concepts.

Abstract: Systems and methods are disclosed for analyzing a set of documents by building a positive set histogram; selecting phrases from the positive set histogram; modifying the frequency statistics in the histogram using the selected phrases; identifying one or more potential phrase-acronym pairs; selecting a subset of phrase-acronym pairs from the potential pairs; adding a new feature for each selected phrase-acronym (phrase ? acronym) pair to a positive set histogram; determining a value for each new feature; identifying one or more child concepts based on an updated histogram; grouping the one or more child concepts; and determining a child concept group coverage for one or more documents.

Abstract: A meta-search system for performing a search over a plurality of data sources via one or more search passes, the system comprising: a search controller for: i) transmitting a search query object having a specified route which lists a plurality of query processors desired to be executed; ii) receiving data request objects from the plurality of executed query processors and transmitting the data request objects to a plurality of data collectors, each data request object being transmitted to associated data collector, iii) receiving result objects associated with the data requests from the data collectors, and iv) transmitting the result objects to a user interface for display; the plurality of query processors being executed according to the specified route to receive and process the search query object, each of the query processors enabled to generate a data request object based on the search query object and one or more data request objects generated by one or more previously executed query processors; and ea

Abstract: A search system has a plurality of resources, including data resources and query and result processing resources. The search system determines the selection and ordering of resources at run-time through a combination of pre-defined default rules and a search strategy that is associated with each search.