Button for 1977 Button for 1984 Button for 1990 Button for 1995 Button for MDC Button for notes Button for examples
Left Hand Pointer

$PIOREFERENCE

M[UMPS] by Example

Right Hand Pointer

Approved for inclusion in a future M[UMPS] language standard.

The value of this variable identifies the initial input/output device. The difference between $Principal and $PIOReference is that the value of $PIOReference always contains a specification of the environment in which the device exists (if the value of $Principal is non-empty).

Use $PRINCIPAL Write !,$Principal,!,$PIOReference
_LTA1024::
|MYNODE|_LTA1024::

Button for 1977 Button for 1984 Button for 1990 Button for 1995 Button for MDC Button for notes Button for examples

Copyright © Standard Documents; 1977-2017 MUMPS Development Committee;
Copyright © Examples: 1995-2017 Ed de Moel;
Copyright © Annotations: 2003-2017 Jacquard Systems Research.

The information in this page is NOT authoritative and subject to be modified at any moment.
Please consult the appropriate (draft) language standard for an authoritative definition.

Some specifications are "approved for inclusion in a future standard". Note that the MUMPS Development Committee cannot guarantee that such future standards will indeed be published.

This page most recently updated on 28-Nov-2011, 20:03:45 .

For comments, contact Ed de Moel (demoel@jacquardsystems.com)