CEI EN 62656-3

This part of IEC 62656 specifies an interface between IEC 62656
series and meta-model for CIM originally defined in IEC 61968 and
IEC 61970 series of standards. The current CIM includes IEC 62325
series and the interface specified in this part of IEC 62656 also
applies to the model defined in IEC 62325-301:2014. More
specifically, this standard defines a formal mapping between the
IEC 62656 and meta-model for CIM in order to import the CIM
ontology into the IEC CDD, and to ensure the interoperability of
ontologies of two standards, or even among a wider spectrum of
standards. For the basis of the mapping from CIM to the data model
defined in IEC 62656-1, the UML representation of CIM is
referenced.

As a result of the interface specification available from this
part of IEC 62656, the smart grid ontology defined in CIM becomes
accessible and interoperable in the midst of ontology pieces
originating in other ontology standards, encompassing material,
environmental, and mechanical, and logistic domains of information.
In addition, the specification may also cover the lifecycle of
products.

This part of IEC 62656 also defines methods for transforming the
IEC CDD content into the format defined in IEC 61968 and IEC 61970
series. However, this standard does not intend any standardization
of the elements defined in IEC CDD as part of the CIM ontology, for
all the definitions of IEC CDD are already part of an acknowledged
horizontal International Standard known as IEC 61360-4-DB. Rather
it makes the pieces of information stored in IEC CDD available for
further standardization or customization in power electric domains
or more specific user communities as a basic resource, in
particular for the purpose of extending the CIM series of
standards.

The data model of this part is based on IEC 62656-1 which
specifies the logical structure for a data parcel, or just simply
“parcel,” that is a short name for the medium of registering or
transferring of product ontology. Such a parcel may be typically
implemented in a leaf of a spreadsheet. The data model built on a
set of parcels is called “parcellized ontology model”, which is
often abbreviated as “POM” in the remainder of this document.

This part of IEC 62656 specifies:

• the mapping rules and principles for importing CIM UML objects
into POM;

• the syntactic and semantic requirements on the parcellized CIM
objects;

• the piecewise version control mechanism in POM for the
parcellized CIM objects.

The following items are outside the scope of this part of IEC
62656:

• definition of the interface between CIM UML and CIM RDF;

• specification of syntactic and semantic requirements on CIM
UML;

• specification of syntactic and semantic requirements on CIM
RDF.