It is a type of index for VFP data, which enforces uniqueness and does not accept nulls (just like a primary key, but you can only have one primary key per table). Check out the topic "Visual FoxPro Index Types" in the VFP Help file. It clearly explains all the different index types (including a tip on how to avoid using UNIQUE indexes).
Rick White Light Computing, Inc. www.whitelightcomputing.com www.rickschummer.com 586.254.2530 - office 586.254.2539 - fax -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Madigan Sent: Wednesday, January 17, 2007 04:00 PM To: [EMAIL PROTECTED] Subject: RE: Index on collector tag collector unique Thanks. What do you mean by "candidate"? _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.

