grgCodelists Codelists for description of registries compliant with ISO/TC 211 19135:2005 registration of items of geographic information 0.1 2006-03-15 specify the type of change that has been made to the item specification relative to the item specification in the external source RE_SimilarityToSource no change has been made to the specification identical the style of the specification has been changed to match the style and structure of other specifications in the register that has imported the specification restyled the specification includes information about its context that is not explicit in the specification in the external source contextAdded the specification of the register item has been generalized to have a broader meaning than the item specified in the external source generalization the specification of the register item has been specialized to have a narrower meaning than the item specified in the external source specialization the nature of the differences between the register item and the similar item in the external source is unspecified unspecified