CEN/TS 17011-3:2024

This document describes:
-  the rationale for building customisation supporting business cases that are specific to their business environment while maintaining organisational and semantic interoperability with the TC 440 specifications;
-  the difference between Usage specification and Extension specification;
-  a methodology on how to define customisations on:
-  BII Transaction specification,
-  Business rules,
-  Code lists;
-  how to claim compliance or conformance to a customisation of a TC 440 specification;
-  the connection to the eProcurement Ontology project.
This specification does not describe the detailed process of building an extension.