This is the complete set of DFDL requirements for Discriminators.
DFDL-2-026R (NEED TEST):DFDL discriminator or assert used to discriminate
DFDL-6-011R:discriminator - Defines a test
DFDL-7-060R:If the discriminator is succes
DFDL-7-061R:If a discriminator is unsucces
DFDL-7-069R:A dfdl:discriminator can be an
DFDL-7-069R2:A dfdl:discriminator can be an
DFDL-21-022R:Discriminators annotations