The actual version (7.1)- November 2015 is an updated and corrected version of the Catalogue. 
The successive columns of the Catalogue contain:

 1-A. Wide-Field Plate Database instrument identifier (instrument code). (txt-number-txt)  
 2-B. Star simbol(s) next to the identifier show which plate catalogues are included so far in the WFPDB or are in preparation to be included: * - at disposal in SSADC, not yet converted in computer-readable form, ** - in preparation in SSADC, converted in computer readable form, *** - included in the WFPDB and avialable on-line.1b-C=
 3-C. Original name of the Instrument in Local plate archive (txt) 
 4-D. Location of the plate archive: town (site)(txt) 
 5-E. Location of the plate archive: archive code - a part of the archive (numb)
 6-F. Location of the plate archive: country,(txt) 
 7-G. Observatory, Institute: name (txt)    
 8-H. Observatory, Institute: display name for Astroweb aplication  (txt)
 9-I. Side code  (txt) 
10-J. Observatory, Institute: site  name (txt) 
11-K. Observatory, Institute: country (txt)  
12-L. Minor Planet Center observatory code (numb)(http://www.minorplanetcenter.net/iau/lists/ObsCodesF.html)
13-M. Time zone (main) (numb)
14-N. Observatory longitude (deg, min)
15-O. Observatory latitude (deg, min)
16-P. Observatory altitude (m)
17-Q. Instrument, Telescope multiplicity (numb)
18-R. Clear aperture of the telescope (m)
19-S. Diameter of telescope mirror (m)
20-T. Focal length of the telescope (m)
21-U. Plate scale (arcsec/mm)
22-V. Instrument type: Ast-astrograph, Cam-camera, FEC-fisheyecamera, Men-meniscus,
      RCr-Ritchey-Chretien, Rfl-reflector, Rfr- refractor, Sch-Schmidt (txt)
23-W. Field angular dimension (deg)
24-X. Years of telescope operation (beginning) (numbers)
25-Z. Years of telescope operation (end)
26-Z. Archive type: Symbol "F" for "film", blank for "plate" (txt)
27-AA.Number of direct plates (numbers)
28-AB.Uncertainty of the number of plates  (:) means that we give only the averege number of the lates  (txt)
29-AC.Original plate number in the basic catalogue from-to (numbers-numbers)  
30-AD.Form of the archive data in the WFPDB for the direct plates: T - printed table form, C - computer-readable form, TC - in preparation in computer-readable form
31-AE.Number of objective prism plates (numbers)
32-AF.Form of the archive data for the objective prism plates: same as for column 30 (txt)
33-AG.Quality of the plate archive: A - very good, B - good, D - distributed (txt)
34-AH.Astronomer in charge (name, A.Family, txt)