shona, I don't make these up (would that I could ;)

1962 Economist 8 Sept. 873/3 The Liberal executive keeps a watch over this agenda by compositing into multi-point motions the ideas. 1965 New Statesman 8 Oct. 506/3 Whereas Labour resolutions generally do have to be composited out of recognition, they at any rate are composited by the delegates themselves and, having been composited, they stand some chance of actually being debated. 1973 Daily Tel. 23 July 34/6 By the time the five-day conference opens on Oct. 1 it [sc. the agenda] will have been ‘composited’ into workable compass. 1979 H. Wilson Final Term ix. 183 NEC members worried about their seats, or concerned with the ‘compositing’ of resolutions on the Saturday afternoon. 1985 Times 30 Sept. 32/1 He has attended ‘compositing’ negotiations to resist any change in the wording.

[at least the last citation had the good grace to use quotation marks!]