Digital Camera Mod
PRIM: refers to a primitive, a piece of core code that can not be altered, and that is the basis of all BHAVs. These things are the hardest to understand and use properly. There's a limited number of primitives.
EXPRESSIONS: these are actual expressions in the BASIC sense of the word: a variable of sorts gets a value assigned to it, or is tested for a specific value in its contents using an Expression.
In fact, the expression is also a Primitive.
PRIV: Private. Refers to a BHAV/BCON or any other resource belonging to the current group, the object you're working on.
SEMI: Refers to a BHAV/BCON that belongs to the category (semi-global) your object falls in. So if your object is a wall-hanging, it gets a GLOB reference to PaintingGlobals, and that makes the BHAVs of that group available in addition to the Private ones.
GLOBAL: that's a special group of resources in addition to the Primitives, that can ALWAYS be accessed, regardless what group or object you're working with.
And of course, this all still means nothing to you at first... Just like cloning, meshing, recolouring, retexturing, slaving and repository-ing mean nothing to me!