Hello, Linux supports some programming interfaces. Several functions are provided as usual. Their application documentation is an ongoing development challenge. Now I would like to clarify possibilities for the specification of desired information together with data types besides properties which are handled by the programming language “C” so far. It seems that no customised attributes are supported at the moment. Thus I imagine to specify helpful annotations as macros. Example: Some functions allocate resources to which a pointer (or handle) is returned. I would find it nice then if such a pointer would contain also the background information by which functions the resource should usually be released. Can it become easier to determine such data? Regards, Markus