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State

The state of an HDS object specifies whether or not its value is defined. It is represented as a logical value where .TRUE. means defined and .FALSE. means undefined.

Objects start out undefined when they are created and become defined when you write a value to them. In general, an error will result if you attempt to obtain the value of an object while it is still undefined.



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HDS Hierarchical Data System
Starlink User Note 92
R.F. Warren-Smith & M.D. Lawden
23rd February 1999
E-mail:rfws@star.rl.ac.uk

Copyright (C) 1999 Central Laboratory of the Research Councils