I don't know what version of Epic you have. We use the fairly-old 4.3.1
version. So there might be some functions to control this in later
versions that aren't in 4.3.1, or that I don't know about (always a
probability). In any case, assuming you use a CALS table and you have
control of your DTD, you can always add a %tbl.table.mdl; entity to your
DTD and change the ATTLIST in its content model from:
frame (top|bottom|topbot|all|sides|none) #IMPLIED
to: frame (top|bottom|topbot|all|sides|none) none
You can still use other values, but it should always default to "none".
Just make sure you declare this in your DTD before you declare your CALS
table.