1. Metadata IN Smart Grid Group Name: REQ
Other suggested titles:
“Benefits of oneM2M Standardization”
Group Name: REQ
Source: Linyi Tian, Huawei,
Meeting Date: Feb 18,
Agenda Item:

2. Outline Metadata in electricity industry:
Provide the overview of metadata & semantics in IEC for Smart Grid
It contains examples which may be related to M2M area
Potential oneM2M Requirements

3. IEC in a Nutshell
IEC 61970
The integration of applications developed by different suppliers in the control center environment
The exchange of information to systems external to the control center environment (transmission, distribution and generation systems);
The CIM (Common Information Model) :
Maintained as a UML model.
Defines a common vocabulary and basic ontology for the electric power industry.
Central package 'wires model' describes the components used to transport electricity.
Derive 'design artifacts' (e.g. XML Schema, RDF Schema) as needed for the integration of related application software.
IEC defines the data model packages
IEC and define an XML format for network model exchanges using RDF.
IEC series of standards extend the CIM to meet the needs of electrical distribution, where related applications include distribution management system, outage management system, planning, metering, work management, geographic information system, asset management, customer information systems and enterprise resource planning.

4. CIM Model and Data Access
: High Speed Data Access (HSDA)
High Level Data Model
Data Objects that can be accessed
Types can be IEC Measurement, Breaker, Substation, etc.
Properties can be IEC Measurement.normalValue=50
Breaker.ampRating=60, etc.
Pathname: unique name in the system. Layout of the pathname is implementation specific. Xpath is recommended to be used.
It is possible to use RESTful approach to access these data in the future with mapping to XPath.

5. Example: Measurement Class
Power System Resource (PSR) may have zero to many measurements:
Semantics defined by

6. Graphics Object Data Model
: Graphics exchange
CIM based graphics exchange has been designed with the use of SVG in mind.
Object
SVG
CgoDiagram
SVG element
CgoGraphicalObject
SVG basic shape or SVG symbol
CgoGroup
SVG group element
CgoLayer
Metadata of SVG element
CgoDiagramView
CgoMetaData
SVG metadata element
The graphics data may be exchanged between substation automation system, control center, planning system and GIS system.

7. Graphics Object Data Model
The graphics medata will be associated with the domain data defined in
References to the presentation logic will be transferred. The local presentation logic should be negotiated between the sending and receiving system in advance.

8. Proposals Recommendation:
Study the metadata from the electricity industry to see whether they are relevant to M2M work area.
Potential requirements:
The M2M system shall provide a common abstraction mechanism for various data models.
The M2M system shall provide a mechanism to map the abstraction data model to physical data models.
The M2M system shall provide a mechanism to allow graphical data exchange.