Validating Multiple Coded Values in Same Record

Hey there,

I was wondering if anyone is aware of a way to handle validating comma-separated values in a single field. (I think that is similar to the issue mentioned here on ArcGIS Ideas: ideas.arcgis.com/ideaView?id=08730000000c0RWAAY)

We currently use a lot of S-57 data in Feature Classes. Though many fields contain only integers, some of these allow multiple values, separated by commas.
E.g. Sample values from a CATBRG field would be:

• 1
• 1,9
• 2
• 9
• 1,2,9

Given the above:

1. Is there any way of validating comma-separated values in a domain, without creating separate Coded Values for every possible permutation (e.g. "1", "1,9", "9,1", "2", "1,2,9", "1,9,2", ...?) We would also be using the domains to create user-readable field values (e.g. "fixed bridge", "fixed bridge, footbridge", ...)
2. Is there any way of handling this content in an integer field instead?

Thanks a lot!