[Ur] Invalid Action expression

[Sergey Mironov]

> Presumably the display of inputs includes several widgets associated with
> different [source]s.  That is, you must allocate new [source]s for each new
> row in the GUI.  The [onclick] code of the button would use [get] to read
> the values of these sources and combine them properly.
>
> Is this answer at a good level of detail?

Almost. I've looked into the basis.urs and find that cformTags widgets
may take sources as arguments and are actually designed to be used
without forms. So probably I should use them instead of formTags
equivalent, correct?