Count a DET’s for each unique user recognizable, nonrecursive field on the ILF or EIF. Fields that are redundant and appear more than one time are only counted one time. Fields that are redundant because of implementation concerns are counted only one time.
Count a DET’s for each piece of data in an ILF or EIF that exists because the user requires a relationship with another ILF to be maintained (key information). If an EIF has multiple key fields only the key fields that relate back to an ILF are counted as data element types.