Abstract: Multiple structured extension definitions can be obtained, each structured extension definition corresponding to one or more categories, and each structured extension definition being written in a software extension language. Data representing one or more registrations maintained in a format native to a registration store can be accessed, and this data analyzed based at least in part on the multiple structured definitions. In other aspects, a structured extension definition written in a software extension language is obtained. The registration store includes registrations stored in a format native to the registration store and different from the software extension language, and the registration store is modified based on the obtained structured extension definition.