Here is how we are using “originating system”.
In LOM IEEE,
Explanation: Type of Requirement (select from drop-down)
Vocabulary: Browser; Operating System; Originating System; Player Viewer
We would then use the Technical.requirement(.orComposite).name field as the name of requirement (in this case, the name of the Originating System).
This is followed by the minimum- and maximumversion fields to be used as needed.
(Note, the IEEE vocabulary for type includes operating system and browser only.)