469 29 6.1 EMIX Interface allows selections by substitution group. However, this makes useful components mutually exclusive when they may go together like aggregatedPnodde and endDeviceAsset. This approach will require definitions of a substitution group for each permutation of interface attributes. Suggest more broadly defined core emixInterface with well established complementary optional components. Alternatively, make the multiplicity of emix:emixInterface maxOccur = unbounded.

SEPARATED (CLONED ISSUES) DEFERRED TO POST 1.0