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.help imtypk Sep86 imfort
.ih
NAME
imtypk -- get the type information for a header keyword
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SYNOPSIS
.nf
subroutine imtypk (im, keyw, dtype, comm, ier)
integer im #I image descriptor of open image
character*(*) keyw #I name of the new keyword
integer dtype #O keyword datatype code
character*(*) comm #O comment string describing keyword
integer ier #O status return
.fi
.ih
DESCRIPTION
The \fIimtypk\fR procedure is used to fetch the information defining
the type and usage of an image header keyword, i.e., the datatype code
and comment string. Knowledge of the keyword datatype may be required
before accessing the value of a keyword to avoid a format conversion error
if only the name of the keyword is known (e.g., when using the keyword-list
package). The \fIimtypk\fR procedure is the only means currently available
for retrieving the comment string associated with a header keyword.
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RETURN VALUE
A zero status is returned if the named keyword exists.
SYS_IDBKEYNF: image header keyword not found
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SEE ALSO
imaddk, imacck
.endhelp
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