.LP
The MERGE structure is used to merge two data paths together, as at 
the end of an If-Then-Else.
When the glyph is executed, the input connection which is currently
active will be passed to the output filename.  Note that
it is assumed that ONLY ONE of the two input connections will be 
valid at one time.  If, by chance, both are valid at once, only
the input from the top arrow will be passed on.  The second input
is optional.
