>...
>
>and 4. Are you not trying to express two distinct things with your last index, namely that an (1) individual attends a conference (Conf+Id) and (2) that an individual is employed by a company (Cy+Id). For the life of me, I cannot imagine what the combination might express.
>
>HTH,
>
>Marc

I agree. Actually, I didn't look at the last index typing the reply. It's really data redundancy which make harm in conjunction with temp relationships.