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The Process Specification Language (PSL) is a set of ISO 18629.
The Process Specification Language can be used for the representation of manufacturing, engineering and business processes, including production scheduling, process planning, workflow management, business process reengineering, simulation, process realization, process modelling, and project management. In the manufacturing domain, PSL’s objective is to serve as a common representation for integrating several process-related applications throughout the manufacturing process life cycle.[1]
The foundation of the ontology is a set of primitive concepts (object, activity, activity_occurrence, timepoint), constants (inf+, inf-), functions (beginof, endof), and relations (occurrence_of, participates_in, between, before, exists_at, is_occurring_at). This core ontology is then used to describe more complex concepts.[2] The ontology uses the Common Logic Interchange Format (CLIF) to represent the concepts, constants, functions, and relations.[3]
This ontology provides a vocabulary of classes and relations for concepts at the ground level of event-instances, object-instances, and timepoints. PSL’s top level is built around the following:[4]
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Relational model, PostgreSQL, International Electrotechnical Commission, Prolog, Ibm
Germany, Deutsches Institut für Normung, Berlin, Iso 15924, Prolog
Wade–Giles, Standard Chinese, Tongyong Pinyin, Wu Chinese, Aspirated consonant
Computer science, Space, Time, Automated planning and scheduling, Energy
Authority control, Epistemology, Library classification, Language, Metaphysics
Epistemology, Aesthetics, Metaphysics, Ethics, Philosophy