A new option, RECURSION, was added to the UDC's OPTION list when MPE/XL was
introduced.
 
RECURSION           Specifies that the search for UDCs is to begin at
                    the beginning of the cataloged commands list.
                    RECURSION and NORECURSION do not have any meaning in
                    a command file, because command files are not
                    cataloged.
 
I think that the scope of the recursion option is limited to the UDC file that
it appears in and not to all the UDC files at a specific level (user,acct,sys).
With this option earlier defined UDC commands can be invoked from subsequent
ones.
 
Paul Christidis
 
______________________________ Reply Separator _________________________________
Subject: Re: UDC's
Author:  Don Harrington <[log in to unmask]> at CCGATE
Date:    1/19/1996 1:15 PM
 
 
On Fri, 19 Jan 1996, Mary E. Plath wrote:
 
> From: mplath
>
> I believe it is correct that UDC's can call other UDC's ?
> Is there a limit to the number of levels of calling?
> Does the called UDC have to be after the caller UDC
> in the file ?
> Thanks
>
1) Yes, UDCs can call other UDCs.
2) Don't know; but I'm sure someone on this list does!
3) Yes, the called UDC must be after the calling UDC either in the same
file or in the file list.  This is due to the way UDCs are accessed; they
can only look forward, not backward.
 
Don  Harrington                         Boeing Commercial Airplane Group
(206) 931-4457 voice                    P. O. Box 3707 M/S 5J-34
(206) 931-9085 FAX                      Seattle, WA  98124-2207
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