Enums that are no longer used

Imported from previous forum

[ original email was from Jim Northey - jnorthey@lasalletech.com ]
Should we ommit enum values that are no longer used from the FIXML Schema?

For instance - OrdType(tag 40) has several enum values that are no longer used - we specify them in the specification - think we should probably leave them out of the FIXML Schema.