1.1 Background

1.2 Purpose of this Document

1.3 ISD Format

1.4 Code Subsidiary Documentation

3.1 ISD Entity 1 – Market Participant Organisation

3.2 ISD Entity 2 – GSP Licensed Distribution System Operator

3.3 ISD Entity 4 – SMR Agent Appointment

3.4 ISD Entity 17 – DUoS Tariff ID

3.5 ISD Entity 18 – GSP Group

3.6 ISD Entity 45 - Market Participant Role

3.7 ISD Entity 61 - Base BM Unit for Supplier in GSP Group

3.8 ISD Entity M3 - Line Loss Factor Identifier

3.9 ISD Entity M7 - Valid Market Segment/ Connection/ Meter Type/ Meter Group

3.10 ISD Entity M8 - Valid Market Segment/ Metering Service Mapping

3.11 ISD Entity M9 - UMS Charge Codes

3.12 ISD Entity M10 - UMS Manufacturer Equipment LED Range Charge Codes

3.13 ISD Entity M11 - UMS Switch Regimes

3.14 ISD Entity M12 - UMS Variable Power Switch Regimes

3.15 ISD Entity M16 - Market Participant to DIP Participant Mapping

3.16 ISD Entity M18 – DIP Market Roles

3.17 ISD Entity ID M20 - SVA Line Loss Factors

3.18 ISD Entity ID M21 - CVA Line Loss Factors

3.19 ISD Entities Changed by the BSCCo.

3.20 ISD Entities Changed by the SVAA

3.21 Rarely Changed ISD Entities

4.1 Introduction

4.2 Entity Diagram