Xanadu had it even earlier: http://en.wikipedia.org/wiki/Project_Xanadu http://en.wikipedia.org/wiki/Project_Xanadu > Every document can contain a royalty mech

Xanadu had it even earlier: http://en.wikipedia.org/wiki/Project_Xanadu http://en.wikipedia.org/wiki/Project_Xanadu > Every document can contain a royalty mechanism at any desired degree of granularity to ensure payment on any portion accessed, including virtual copies ("transclusions") of all or part of the document.