A system may include determination of a plurality of data structures associated with an entity, each of the plurality of data structures associated with a respective validity period, determination of a plurality of non-overlapping time periods based on the validity periods, the plurality of non-overlapping time periods collectively spanning all of the validity periods, determination, for each of the plurality of non-overlapping time periods, of a composite data structure based on each of the data structures associated with a validity period including the non-overlapping time period, assignment of a respective document identifier to each composite data structure, each document identifier indicating the entity, and indexing of the composite data structures within an index.