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.help imacck Sep86 imfort
.ih
NAME
imacck -- determine if the named header keyword exists
.ih
SYNOPSIS
.nf
subroutine imacck (im, keyw, ier)
integer im #I image descriptor of open image
character*(*) keyw #I name of keyword to be accessed
integer ier #O status return
.fi
.ih
DESCRIPTION
The \fIimacck\fR procedure is used to test if the named header keyword
can be accessed, i.e., if it exists.
.ih
RETURN VALUE
A zero status return indicates that the header does indeed have such a
keyword.
IE_NEXKW: nonexistent header keyword referenced
.ih
SEE ALSO
imtypek, imaddk, imokwl
.endhelp
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