diff --git a/modules/database/src/std/link/links.dbd.pod b/modules/database/src/std/link/links.dbd.pod
index 93da47655..c1b61a320 100644
--- a/modules/database/src/std/link/links.dbd.pod
+++ b/modules/database/src/std/link/links.dbd.pod
@@ -130,7 +130,9 @@ An optional expression that returns non-zero to raise a minor alarm.
 
 A JSON list of up to 24 input arguments for the expression, which are assigned
 to the inputs C<A>, C<B>, C<C>, ... C<U>. Each input argument may be either a
-numeric literal or an embedded JSON link inside C<{}> braces. The same input
+numeric literal or an embedded JSON link inside C<{}> braces. A C<pva> link
+could provide values from another record in this or other IOCs if built in, but
+the built-in non-JSON CA or DB link types are not supported. The same input
 values are provided to the two alarm expressions as to the primary expression.
 
 =item out