Abstract: A system and method for near real-time, high performance analysis, including indexing and searching, of large amount of structured and unstructured content represented in XML format using summary information along multiple groupings. This operational data store system and method provides a new data structure representation and query technique which allows information systems software applications and end users to access key performance indicators from arbitrary content without prior knowledge relating the data-type structure or having access to the original business content. The present invention utilizes Compound Aggregate Indexes.