Definition
Master Data (also called Stamdata or Grunndata in Norwegian) is the authoritative data in an organisation's system landscape. It is stored and managed in a System of Record - the primary master source system where data is owned and updated. The concept is central to systems architecture: there should always be one and only one source of truth for each dataset. In the energy sector, typical master data includes metering pointThe fundamental unit in Elhub - the unique point in the electricity network where energy is measured and settled, identified by an 18-digit GSRN number. data in ElhubNational hub for metering data and market processes in the Norwegian electricity market., customer data in a CIS system, and asset data in NIS/GISGeographic Information System - system for collecting, storing and analyzing location-based data - used in network mapping and planning.. Master data differs from replicated dataCopies of master data transferred from a System of Record (Master) to a receiving system (Slave/Replica). The data has the same content but is not owned or updated in the receiving system. (downstream data) in that it is the primary source - not a copy. Master Data Management (MDMMeter Data Management - system for collection, storage, quality assurance and distribution of metering data from the electricity grid.) concerns the processes and systems that ensure master data is accurate, complete and consistent.