IEC Common Data Dictionary

IEC Common Data Dictionary (abbreviated: IEC CDD) is a metadata registry according to ISO/IEC 11179.

Data Specification

The data specification for IEC CDD is provided by IEC 61360.

Intended Use

IEC CDD is intended to support electronic exchange of digital information. Such information may be based on concepts, which are standardized as a common basis. For example such exchange can be related to e-commerce [1].

Scope

IEC CDD stores concepts which are based on IEC 61360, such as - Uniquely identified classes and properties, and their relations; - Uniquely identified values and value lists; - terminology and definitions based on accepted international standards; - technical representation of concepts including units and data types and their identification.

Content

The IEC CDD hosts different ontologies[1, 2] for o measuring instruments, o mechanical fasteners, o optics and o photonics, o electro-electronic components, o plant devices, and o environmental declaration. o low voltage switchgear and controlgear,

The dictionary is organized into different domains, providing this information, for example: o IEC 61360-4 : o IEC 61987 : process control devices

Procedure to introduce new information into IEC CDD

The procedure to integrate new concepts is defined by “ISO/IEC directives supplement – Procedures specific to IEC” [3], Annex SL. In order to provide new content or improvement of the content of IEC CDD, a Change Request (CR) may be submitted to IEC SC3D. The CR is reviewed by SC3D experts for syntactic correctness and completeness. After that, during Evaluation stage the CR will be checked for correctness of formal definitions according to the definition rules as defined by ISO/IEC directives Part 2 [4], as well as syntactic and semantic consistency. After these checks the CR is voted to reach Validation stage. [5]