VCS_get_id

	Name		: VCS_get_id

	Synopsis	: char *VCS_get_id ( tdtlen, tdt )
			  int   tdtlen,
			  char *tdt

	Arguments	: tdtlen,	length of tdt
			  tdt           thordata tree

	Description	: Gets the data item corresponding to the 
			  environment variable $VCS_ID_SUPPLIER.
			  This is the suppliers identifier for this 
			  particular compound.
			  $VCS_ID_SUPPLIER is obtained from the system 
			  on the first call.
			  Returns an independent copy of the identifier.

	Restriction	:

	Error		:

	Related
	Modules		: