The DRM in relation to SRM, EDCS
The DRM provides the syntax and the structural semantics for the expression of environmental data
It relies on the SRM for specifying location of environmental data, and
It relies on the EDCS to capture the semantics of the environmental data
In analogy to natural languages, the DRM can be thought of as the grammar, and the EDCS as the dictionary of words
Semantics of the data depend on both the grammar and the dictionary