subroutine: GDSD_GRDBLE purpose: read a descriptor from a specified level category : header file: gdsd_grxxx.c author: Do Kester do@guspace.rug.nl use: call gdsd_grdble( set_id, I character*(*) key, I character*(*) axes, I integer(n) grid, I integer(n) n, I integer value, O double precision error ) O integer set_id name to search the key in key gds_descriptor to search for axes list of defined axes axes which are not mentioned are undefined grid list of grid positions on the specified axes n number of defined axes and grids value returned value; if not found value remains as it was upon input error if succesful: level where the item was found if not: error code as in GDSD_Rxxx description: externals: GDSD_Rxxx updates: 15/11/90 DK, code