Patent ID: 7028028

Claim:
A query processing method, comprising the operations of: receiving input including a statement of a markup language data schema and data described by the markup language data schema; preparing a translation of the markup language data schema into a relational database schema comprising multiple table definitions each table definition comprising multiple column definitions; utilizing the translation to translate the received data into translated data comprising an instance of the relational database schema; a wrapper performing operations comprising: receiving query input including at least one of the following: 1) query conditions referring to data formatted according to the markup language data schema, and 2) result-assembly instructions for constructing query results according to the markup language; wherein the received query input resides in a query language that is structured to operate upon markup language data and contemplates query actions comprising any two or more of Selection, Projection, Join, Grouping, Ordering, and Navigation with at least one of Join and Grouping at minimum; preparing query instructions implementing at least a portion of said query input, the query instructions including structured query language (SQL) query conditions referring to said relational database schema; issuing one or more commands to execute the query instructions upon the translated data to produce query results; receiving the query results and providing an output of the query results according to the query input.