The diagram below shows the Contract module. A ‘Contract’ is defined in the CC-Glossary as “a binding agreement, between two or more legal persons, that is enforceable by law”. Under this definition, an invoice can also be a contract. This module specifies the information that should be provided for a contract associated with a ‘Purchase Phase Problem’ or ‘Post-purchase Phase Problem’. Notice that we speak of a ‘Contract’ from the moment there is a ‘Contract Order Date’.

For the definition of each vocabulary in this diagram please see the CC-Glossary. Notice that according to our ontology design, each relation in this diagram is a lexon in the CC-Lexons; this methodological principle is called Ontology double-articulation.

This module is represented using the ORM graphical notation. The verbalization (i.e. the pseudo-natural-language reading) of the rules in this diagram, and the ORM markup (i.e. the XML-based serialization) of this diagram can be found below.