ALPS - A Language for Process Specification
This language was developed for representing manufacturing process plans, and is thoroughly documented in the following papers:
"ALPS - A Language for Process Specification," International Journal of Computer Integrated Manufacturing, special issue on Process Planning and Design for Manufacture, 4, #2, pp. 105, 1991.
"Using the ALPS Process Plan Model," Proceedings of the ASME Manufacturing International Conference, Dallas, Texas, March 1992.
"A Production Management Information Model for Discrete Manufacturing," Production Planning and Control, Vol. 6, No. 1, 65-79, 1995.
The original model has been re-coded in the SHACL language.