
For the purposes of the present document, the following abbreviations apply:

* COSEM: Companion Specification for Energy Metering
* DLMS: Device Language Message Specification
* GPS: Global Positioning System
* MAC: Media Access Control
* OBIS: OBject Identification System
* OLTC: On-Load Tap Changer
* OWL: Web Ontology Language
* PRIME: PoweRline Intelligent Metering Evolution
* RDF: Resource Description Framework
* RDF-S: Resource Description Framework Schema
* SAREF: Smart Applications REFerence ontology
* SAREF4GRID: SAREF extension for the Smart Grid domain
* SKOS: Simple Knowledge Organization System
* UML: Unified Modelling Language
* UTC: Universal Time Coordinated