Add SecuritySubType to SecurityTypes message

Imported from previous forum

[ original email was from Jim Northey - jnorthey@lasalletech.com ]
Add SecuritySubType to Security Type Request and Security Types messages. In security types add as a repeating group.

Expand query capability on Security Type Request message.

Modify the message to have a TotNumTypes field to permit message fragmentation due to the number of possible security types now available with fixed income.

[ original email was from Kevin Houstoun - kevin.houstoun@ssmb.com ]
This has been assigned ID [PC20030319_7] and will be discussed by the technical committee

> Add SecuritySubType to Security Type Request and Security Types messages. In security types add as a repeating group.
>
> Expand query capability on Security Type Request message.
>
> Modify the message to have a TotNumTypes field to permit message fragmentation due to the number of possible security types now available with fixed income.
>