Complex data assembly identifier thesaurus

Systems and techniques for the creation and use of a complex data structure identifier thesaurus. In one aspect, an article comprises one or more machine-readable media storing instructions operable to cause one or more machines to perform operations. The operations include receiving, from a data processing system, a collection of mapping information identifying a first object and a first collection of two or more keys used to identify the first object, determining whether a first key in the first collection is found in a first mapping group of a mapping data store, determining whether second key in the first collection is found in a second mapping group of the mapping data store, and merging the first mapping group and the second mapping group to reflect that objects from the first mapping group and the second mapping group are related.