It is assumed that basic concepts of OPC UA information modelling, the DEXPI specification and the ISO 15926 and Proteus XML are understood in this specification. This specification will use these concepts to describe the DEXPI Information Model. For the purposes of this document, the terms and definitions given in OPC 10000-1, OPC 10000-3, OPC 10000-4, OPC 10000-5, OPC 10000-7, OPC 10000-8, the DEXPI specification and the ISO 15926 as well as the following apply.

Note that OPC UA terms and terms defined in this specification are italicized in the specification.