IEC 61970-501:2006

INTERNATIONAL IEC
STANDARD 61970-501
First edition
2006-03
Energy management system application
program interface (EMS-API) –
Part 501:
Common Information Model Resource
Description Framework (CIM RDF) schema

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INTERNATIONAL IEC
STANDARD 61970-501
First edition
2006-03
Energy management system application
program interface (EMS-API) –
Part 501:
Common Information Model Resource
Description Framework (CIM RDF) schema

 IEC 2006  Copyright - all rights reserved
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– 2 – 61970-501  IEC:2006(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references .6
3 Terms and definitions .7
4 Structure of an XML document .7
4.1 General .7
4.2 Elements .8
4.3 Attributes.8
5 Metadata and RDF Schema.8
5.1 General .8
5.2 Resource.8
5.3 Property .9
5.4 Namespaces .9
5.5 CIM RDF Schema extensions .9
6 CIM metadata.12
6.1 General .12
6.2 Schema.12
6.3 Mapping from UML .13
6.4 Example CIM RDF Schema elements .15

Annex A (informative) CIM RDF Schema generation – Mechanism for schema generation .18

61970-501  IEC:2006(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
ENERGY MANAGEMENT SYSTEM APPLICATION
PROGRAM INTERFACE (EMS-API) –
Part 501: Common Information Model Resource
Description Framework (CIM RDF) schema

FOREWORD
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International Standard IEC 61970-501 has been prepared by IEC technical committee 57:
Power systems management and associated information exchange.
The text of this standard is based on the following documents:
FDIS Report on voting
57/801/FDIS 57/813/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 61970-501  IEC:2006(E)
IEC 61970 consists of the following parts, under the general title Energy Management System
Application Program Interface (EMS-API):
Part 1: Guidelines and general requirements
Part 2: Glossary
Part 301: Common Information Model (CIM) base
Part 302: Common information model (CIM) financial, energy scheduling and reservations
Part 401: Component interface specification (CIS) framework
Part 402: Component interface specification (CIS) – Common services
Part 403: Component Interface Specification (CIS) – Generic data access
Part 404: Component Interface Specification (CIS) – High speed data access
Part 405: Component Interface Specification (CIS) – Generic eventing and subscription
Part 407: Component Interface Specification (CIS) – Time series data access
Part 453: Exchange of Graphics Schematics Definitions (Common Graphics Exchange)
Part 501: Common Information Model Resource Description Framework (CIM RDF) schema
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual edition of this standard may be issued at a later date.

—————————
Under consideration.
61970-501  IEC:2006(E) – 5 –
INTRODUCTION
This standard is part of the IEC 61970 series that define an Application Program Interface
(API) for an Energy Management System (EMS). This standard is based upon the work of the
EPRI Control Center API (CCAPI) research project (RP-3654-1).
This part specifies the mapping between the conceptual model specified as Unified Modeling
Language (UML) defined in IEC 61970-3XX series: Common Information Model and the
machine readable Extensible Markup Language (XML) representation of that schema using
the Resource Description Framework (RDF) Schema specification language.

– 6 – 61970-501  IEC:2006(E)
ENERGY MANAGEMENT SYSTEM APPLICATION
PROGRAM INTERFACE (EMS-API) –
Part 501: Common Information Model Resource
Description Framework (CIM RDF) schema

1 Scope
This International Standard specifies a Component Interface Specification (CIS) for energy
management systems application program interfaces. This part of IEC 61970 specifies the
format and rules for producing a machine readable form of the Common Information Model
(CIM) as specified in the IEC 61970-301 standard. It describes a CIM vocabulary to support
the data access facility and associated CIM semantics.
This part of IEC 61970 supports a mechanism for applications from independent suppliers to
access CIM metadata in a common format and with standard services for the purpose of
subsequent CIM data access. Secondary objectives are to provide CIM versioning capabilities
and a mechanism that is easily extensible to support site-specific needs. The proposed
solution:
• is both machine readable and human readable, although primarily intended for
programmatic access;
• can be accessed using any tool that supports the Document Object Model (DOM)
application program interface;
• is self-describing;
• takes advantage of current web standards.
This document is the Level 2 Component Interface Specification document that describes in
narrative terms (with text and examples based on the CIM), the detailed definition of the CIM
metadata interface to be standardized.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 61970-1, Energy management system application program interface (EMS-API) – Part 1:
Guidelines and general requirements
IEC 61970-2, Energy management system application program interface (EMS-API) – Part 2:
Glossary
IEC 61970-301, Energy management system application program interface (EMS-API) –
Part 301: Common Information Model (CIM) base
IEC 60050 series: International Electrotechnical Vocabulary

61970-501  IEC:2006(E) – 7 –
3 Terms and definitions
For the purposes of this part of IEC 61970, the terms and definitions given in IEC 61970-2, as
well as the following, apply.
3.1
Common Information Model
CIM
abstract model that represents all the major objects in an electric utility enterprise typically
contained in an EMS information model
NOTE By providing a standard way of representing power system resources as object classes and attributes,
along with their relationships, the CIM facilitates the integration of EMS applications developed independently by
different vendors, between entire EMS systems developed independently, or between an EMS system and other
systems concerned with differ
...