Following the implementation of MHHS, there is a requirement to host a selection of ISD information acquired from the Market Domain Data Tables (currently hosted by Elexon), centrally within the REC Data Specification. The existing data tables are as follows. MDD Entity ID 27 – Clock Interval (c.11,000 records) MDD Entity ID 29 – Measurement Requirement (c.1500 records) MDD Entity ID 32 – Standard Settlement Configuration (c.1000 records) MDD Entity ID 38 – Time Pattern Regime (c.1200 records) Given the volume of data contained within these tables, the simplest solution is to host and provide this information to REC parties, via Spreadsheet (CSV format) on the existing RTS platform, Digital Navigator/EMAR. We would like to consult parties for their view on presenting the data in this format. There are other formatting options we could consider, including the provision of this information in more than one format. Option 1 – CSV only Option 2 – SQL only Option 3 – SQL and CSV This new Category 3 document will also be added to the REC Baseline Statement.