Abstract: Current descriptions of C⁴ISR system capability requirement are mostly based on static model such as literature and static diagram,and lack of definition of specific operation to information and data,which leads to lack of detailed explanation of behavior between objects.Since the capability model which lacks executable dynamic semantics is unexecutable,a modeling approach to capability requirement process based on activity diagram was proposed to support the modeling and simulation of executable architecture.Firstly,definition of system process model was presented,and with the guidance of C⁴ISR capability metamodel,capability requirement process metamodel was built by extending UML activity diagram.Then ontology was used to describe the semantics of capability requirement process metamodel,and validation of C⁴ISR capability requirement process metamodel was done through reasoning of ontology.

Key words: Capability requirement,Executable,Activity diagram,Process modeling,Model validation