Retrieve Spool Attributes within a printer file. The TAA tool RTVPRTFA
retrieves the attributes unique to a printer as return variables in a CL
program. RTVSPLA retrieves the spooled file attributes (e.g. OUTQ) within a
printer file. This differs from TAA tool RTVSPLFA which retrieves the
attributes of a spooled file. Uses an outfile to access the information.
Simpler than using DSPFD when only a single file is needed.