VDFS' document numbering system is based on ESO's VLT Documentation
Plan, VLT-PLA-ESO-00000-0005, Draft B, 5 July 1991 as adopted for
VISTA

The format for all VDFS documents is: VDF-BBB-CCC-DDDDD-GGGG

BBB is type of document {\doctype}.
Applicable BBB codes:

 PLA Plan
 SPE Specification
 SOW Statement of work
 TRE Technical report
 MIN Minutes of Meeting
 MAN Manual
 MEM Memo
 CRE Change request
 INS Instruction
 DWG Drawing
 AMD Format of Amendments
 RFW Request for Waiver
 DNO Discrepancy Notice
 SCH Schenatic/layout/diagram
 ICD Configuration Data Item List


CCC is identified of company/organisation.
Applicable CCC codes:

 ATC UK ATC specific documents
 JAC Joint Astronomy center
 WFA Wide Field Astronomy Unit Edinburgh
 CAS Cambridge Astronomical Survey Unit
 VPO VISTA Project Office
 WFC WFCAM
 UKI UKIDSS
 VSC VSC/Project Scientist ownership
 VEB VISTA Executive Board ownership
 VPB VISTA Project Board ownership
 ESO ESO documentation specific to VISTA


DDDD is product code, which will tie into the overall WBS as defined elsewhere 
(TBD).

GGGG is a four digit sequential number in each DDDD sub-group.

If we follow this, then all our documents become, e.g.

WFC-TRE-CAS-DDDD-GGGG

*******************************************************************************

The above came from Jim, the following is my (STH) interpretation.

I think DDDD should be the WP number and
        GGGG should be the doc number

Some example docs would be:

wfcampipedoc	VDF-SPE-IOA-0002-0001
photom		VDF-SPE-CAS-0011-0001
cal plan	VDF-PLA-CAS-0011-0002

The bits I'm confused about are:

1: when do we use PLA, TRE etc ?

2: is the final number the absolute number of the document, the number
of the document in it's specific WP or the number of the Type of the
document in it's WP. At the moment i'm going for the middle one of
those three.

3. I've used IOA instead of CAS.