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Obtaining an HDS Locator for an NDF   

The NDF_ system also allows you to obtain an HDS locator for a data structure whose NDF identifier you supply. In effect, this is the reverse of the importation process described in §[*]. It is performed by the NDF_LOC routine, as follows:

      CALL NDF_LOC( INDF, MODE, LOC, STATUS )

The MODE argument specifies the mode of access required (`READ', `UPDATE' or `WRITE') and LOC returns the resulting HDS locator. Note that you should annul this locator (e.g. using DAT_ANNUL) when it is no longer required, as the NDF_ system will not perform this task itself.



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Next: NDF Placeholders
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Starlink User Note 33
R.F. Warren-Smith
11th January 2000
E-mail:rfws@star.rl.ac.uk

Copyright © 2000 Council for the Central Laboratory of the Research Councils