From Kx Wiki
view (view function)
The view function returns the expression defining the dependency passed as its symbol argument.
q)v::2+a*3 / define dependency v q)a:5 q)v 17 q)view `v / view the dependency expression "2+a*3"
a view must have no side-effects, be set outside of a function, and be the only expression on the line, with no trailing semicolon, nor any preceding whitespace.
For a complete list of functions, see the kdb+ Function Reference.