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IEC Common Data Dictionary

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IEC Common Data Dictionary (abbreviated: IEC CDD) is a metadata registry according to ISO/IEC 11179. It is used to host product classifications.

Use

IEC CDD originaly was intended to support electronic exchange of digital information (e.g. for e-commerce [1]).

The exchanged information is based on concepts, which are standardized as a common basis.

New information concepts related to smart manufacturing and Industrie 4.0 are based on use of IEC CDD and similar dictionaries. The intention for these use cases is to provide the meaning of data values by referencing the data definitions in the dictionaries. Such annotated data values then can be exchanged within one production system between machines of different manufacturers or between different companies.[2]

Scope

The data specification for IEC CDD is provided by IEC 61360. This means 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.[3]

The representation of a product and its features is based on a hierarchy of classes. The characteristics of the product are represented with help of the property definitions related to the classes. Such property definitions may be based on general datatypes or based on specific values and value lists (e.g. for defining a supported range). Each class and each property may be defined with name and textual descriptions in multiple languages.

Such a definition for a property representation can be used as base for product descriptions in e-catalogues or for B2B communications (see B2B e-commerce)[4].

Content

The IEC CDD hosts different product classifications (based on international standards) for

  • process automation equipment (based on IEC 61987),
  • low voltage switchgear and controlgear (based on IEC 62683),
  • electro-electronic components (provided by IEC T47),
  • optics (based on ISO 23584, test[note 1]),
  • measuring instruments (based on IEC ISO 13584-510, test[note 1]),
  • environmental declaration (based on IEC 60721, test[note 1]).[1][5]

The dictionary is organized into different domains, each domain providing one of these ontologies.

The IEC CDD also hosts UNITS for MEASUREMENT (based on IEC 62720).

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",[6] 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,[7] as well as syntactic and semantic consistency. After these checks the CR is voted to reach Validation stage.[8]

See also

IEC CDD

Notes

  1. ^ a b c Ontologies marked with 'test' have restricted access only.

References

  1. ^ a b Juhel, P. (21 September 2017). "eCl@ss references to product standards requirements: IEC 62683 approach" (PDF). 6. eCl@ss Kongress 2017. eCl@ss. Retrieved 29 January 2018.
  2. ^ "Examples of the Asset Administration Shell for Industrie 4.0 Components – Basic Part" (PDF). ZVEI. April 2017. Retrieved 26 September 2018.
  3. ^ "IEC CDD". IEC Common Data Dictionary. IEC. Retrieved 29 January 2018.
  4. ^ Morand, Fachot (2015). "Common Data Dictionary helps drive business forwards". eTech. Retrieved 20 October 2018.
  5. ^ Murayama, H.; Wang, L.; Hosokawa, A. "Building a bridge between CIM and PLIB ontologies via IEC62656 on data parcels" (PDF). Grid-Interop Forum 2010 (Nov 30 - Dec 3, 2010). Retrieved 22 November 2013.
  6. ^ ISO/IEC Directives Part 1 with IEC Supplement - Procedures for the technical work – Procedures specific to IEC (PDF). ISO/IEC. 2016. Retrieved 29 January 2018.
  7. ^ ISO/IEC Directives Part 2 - Principles and rules for the structure and drafting of ISO and IEC documents (PDF). ISO/IEC. 2016.
  8. ^ Nicolais, L.; Moreno, A. (2014). Interoperability for digital engineering systems. Milano: Angeli.
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