An information processing system for processing queries, the information processing system comprising:a memory comprising at least one received data query, the received data query associated with a set of hierarchical markup documents;a processor communicatively coupled to the memory;a query processor communicatively coupled to the processor, wherein the query processor is for extracting at least one query path expression from the data query; anda data modeler communicatively coupled to the query processor and the processor, wherein the data modeler is for:processing the query path against at least one shared hierarchical markup document in a plurality of shared hierarchical markup documents, wherein the plurality of shared hierarchical documents is associated with the set of hierarchical markup documents;generating, in response to the shared hierarchical markup document completely matching the query path expression, a query result for the data query based on the processing of the query path expression against at least one of the shared hierarchical markup document and the difference hierarchical markup document.
