@window isn't an @container

cf http://spec.axrproject.org/specification.html#n1.3.7.1
consequence of c7867d6f079f63fdfda7878e1562e4e6903099ab
shorthands are put into brackets

these values don't reset their respective properties: they correspond to
other properties
Emended the reference object's chapter

added @window
improved examples and descriptions