System and method for producing variable information documents using undetermined data sources

A system and method is provided for printing variable information documents including processing a VI request which has a dynamic reference and uses a namespace and schema, wherein the dynamic reference specifies information to be integrated into a resolved document. The processing includes mapping between respective namespaces and schemas used by a plurality of data sources and the namespace and schema used by the VI request, and generating at least one query in accordance with the dynamic reference and the mapping. The data sources are queried using the generated at least one query. The resolved document is generated and printed, including integrating data received in response to the querying into the resolved document. The data source(s) to be queried may be selected based on a comparison of a type of information available from the plurality of data sources and a type of information requested via the dynamic references.