[p4] Mapping files in Depot to actual Perforce Storage

[Weintraub, David]

I have decided to implement a script like Richard Baum's trigger which
removes obsolete binary versions of a file. I have a few minor
questions:
 
1). I notice that the binary files names are usually 1.X.gz where "X" is
the revision number of the file. Why do they start with "1."? Could a
file be "2.X.gz"?
 
2). Are all binaries "compressed, so I will expect revision #5 of a file
to be "1.5.gz" and never "1.5"? Or, do I need to look at the file type
and somehow determine whether or not it is compressed.
 
3). I notice that "1.1.gz" is missing in some files. Is this due to the
"lazy copy"  from a branch?
 
4). I want the ability to verify that a particular version of a file
contains no labels. Is the best way to do a "p4 labels
<fileName>#<version>" and see if any labels are listed?