A computing system comprises, in one example, a difference generation component configured to access a type file representing a type in a base version of a computing system and identify a customization made to the type in the base version of the computing system to obtain a customized version of the computing system, and a type accessing component configured to serialize the customization into a customization file of a given file format, the customization file having a separate element representing each customization made to the type in the base version of the computing system to obtain the customized version of the computing system, the type accessing component storing the customization file as a separate file from the type file.