I Think most of the WJC UD POE cards that was issued for a player from 1990 to 2000 are listed and considered rookie cards by many in the hobby including TCDB. However by TCDB and many in the hobby definition of what is a RC these should not be a RC or even a XRC. They are a prospect cards and should not be listed as RC.
For example Joe Thorntons 1996-97 Upper Deck #370 is a World Junior card in the base Upper Deck set, and he was not even drafted till June of 1997. Non of the 1996-97 Joe Thorntons should be listed as a RC. Only his 1997-98. cards are RCs.
This i true for all the WJC POE cards that Upper Deck issued during the years of 1990-2000.
This should be corrected to stay consistent with TCDB rule on what is a RC