All - What about communications between RTOs and SPX/IDC where we get some data(such as forecast, outage,etc.) from our MPs and other RTOs thru these 3rd Party entities?

EMIX is an information model and does not describe specific communications for specifc market contexts. EMIX strives instead to provide product information common to all such contexts. The TC would welcome specific product attributes or communications that are not handled by the existing schemas.