What does it all mean?

In my "FROM" clause the first table is you might say, "Grayed out", but not in the usual sense of, "You can't do anything with this." It seems to be somewhat the opposite. In particular, when I use the nt alias for the table followed by a period, the query assist comes to my aid. But when I try the same with the nb alias, no such help. I can DESCribe the black table and query from it just fine. What's going on here?

FROM
     ntrpcls nt,
     nbrclsh nb

TGIF!!

Dan
Daniel B Madvig
Campus Technologies

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