MDS - a compilation of “essential” market data provides a “context” for everyday tasks. You can call it a market-environment (as known in Barclays.)
There’s a single MDS known as the default MDS, used for EOD marking. For example, the USD yield curve is one of many, many objects within an MDS.
Each murex user belongs to a group. Each group can have its own “local” MDS in additional to the default MDS. Think of it as changing skin on a browser.
This “local” MDS could be 99% identical to the global default MDS, but the group could edit any part of their local MDS for their business function such as price distribution.
Each office location could also use its own local MDS.
