FTS1_ISKEY

Inquires whether or not a string is a valid FITS keyword

Description:

This routine tests whether a given string would be a valid FITS header keyword or not. For a keyword to be valid it must be no more than eight characters, and must comprise only uppercase Latin letters, numbers, underscore, and hyphen.

Invocation

CALL FTS1_ISKEY( KEYWRD, VALID, STATUS )

Arguments

KEYWRD = CHARACTER ∗ ( ∗ ) (Given)
The string to be tested.
VALID = LOGICAL (Returned)
If true, the string is a valid FITS header keyword.
STATUS = INTEGER (Given and Returned)
The global status.

Notes:

This routine does not convert the string to uppercase or remove leading blanks before validation.