plasmid nomeclature

["Mayer, Jorge ", 3637]

>I have a rather simple question regarding the description of a plasmid as
presented in a paper.  The plasmid contains multiple genes that have been
spliced together and this is described in the paper as "CAB::LUC::E9".  I
know the CAB, LUC, and E9.  Is there any significance to the "::"?  Does
it have a specific meaning ?  Excuse the ignorance if this is common.
Mungo


"::" ----- I normally read this convention as an insert interrupting some 
gene, in this case it seems to be a luc insert in cab, while the luc itself 
contains the e9, is that right?
 -Jorge