The XML specification to enable the interchange of information necessary
to account, to analyze, and to trade financial instruments of the world's markets.
A selectionItem is a container that identifies (and the relevant valuation of) an instrument or item that is part of a selection (see "selection") and the associated parameters used in the computation (as with a "component"). "selectionItem" value=("componentValue" * "multiplier" + "baseValue") * "weighting". Typically, "baseValue" will be 0.0 and "multiplier" will be 1.0 thus "weighting" identifies how many of the items identified by "componentIdentifier" are delivered/received for this selection.
