1) Australian musical 2) Ballet by George Balanchine 3) Composition by John Cage 4) Degrees of change 5) Some musical works 1) Music 2) Twists 
[Cage] Variations is a series of works by the American composer John Cage. A number of the pieces in the series are seminal examples of indeterminate music, others are happenings: performance pieces executed according to the score. ==The series== ===Variations I (1958)=== The first piece in the series is dedicated to David Tudor and was a b...[Stravinsky] Variations: Aldous Huxley in memoriam is Igor Stravinsky`s last orchestral composition, written in 1963–64. ==History== Stravinsky began work on the Variations in Santa Fé, New Mexico in July 1963, and completed the composition in Hollywood, California on 28 October 1964. It was first performed in Chicago on 17 April 1965, b...[ballet] == Cast == === original === == Reviews == ...
changes in work authorised by the architect. see contracts/contracting. 
versions, kinds
composition form in the theme is repeated several or many times with various modifications.