Defines Process Method Method describing a process (Can also be a dictionary entry) Complex Type for process methods definition Text and/or language defining rules for process profile (e.g. inputs, outputs, parameters, and metadata) Textual description of the i/o structure Textual and/or MathML description of the algorithm Textual description of the algorithm Includes or reference a MathML doc specifying the maths of the algorithm Points to the reference implementation of this process in the specified programming language (can be a SensorML process chain) Textual description of the algorithm process method substitutionGroup for languages that define rules Includes or references a schematron doc for enforcing process constraints Includes or references a relaxNG doc for enforcing process constraints