----------------------------
revision 0.3
date: 2003/10/03 07:56:51;  author: selsky;  state: Exp;  lines: +23 -5
Add instance argument
----------------------------
revision 0.2
date: 2003/09/26 03:36:16;  author: selsky;  state: Exp;  lines: +15 -11
Make 'value' argument be a relation
Add some comments
Remove unneeded variables
----------------------------
revision 0.1
date: 2003/09/19 09:35:43;  author: selsky;  state: Exp;
initial revision
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