;++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
;
;*NAME:                pics_db_xtr
;
;*CATEGORY:            PMAS Instrument Control Software
; 
;*PURPOSE:             extract arrays of keywords and data from database
;
;*CALLING SEQUENCE:    pics_db_xtr ,err ,picsdb,n,keywords,data ,/VERSION, FILE=
;
;*PARAMETERS
;             input:   picsdb     
;
;            output:   err         error variable (mandatory)
;                      n           number of database entries found (optional)
;                      keywords    strarr, n extracted keywords (optional)
;                      data        strarr, corresponding n data entries (optional)
;
;          Keywords:   /VERSION        flag (return version no. in err variable)
;                      FILE=<string>   print to file
;
;*EXAMPLES:
;
;*SYSTEM VARIABLES USED:
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;*COMMON BLOCKS:
;
;*INTERACTIVE INPUT:
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;*SUBROUTINES CALLED:
;
;*FILES USED:
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;*SIDE EFFECTS:
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;*RESTRICTIONS:
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;*NOTES:
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;*PROCEDURE:
;
;*MODIFICATION HISTORY: 
pics_db_xtr_VERSION = 'pics_db_xtr.pro Version 1.0 --- 31/05/02 mmr'
;
;	31/05/02	MMR	initial programming
;          
;*AUTHORS:
;
;	MMR		Martin M. Roth	Astrophysikalisches Institut Potsdam
;					An der Sternwarte 16
;					D-14547 Potsdam  
;					Tel. +49 - 331 - 7499 313
;                                       email: mmroth@aip.de
;-