Replaced use of <csvHost:fName> with <rdeCsv:fRoid> in the "host" <csvHost:deletes> <rdeCsv:csv> element.
Removed the definition of the <csvDomain:fOriginalName> field element since the <csvNNDN:fOriginalName> field element handles the case of referencing the original domain name of a variant.
Added use of the MUST keyword for CSV fields that are required to be supported in an EPP based system (partially)