doctrine-mapping.xsd sequence relation-entities

I noticed some problems with
the doctrine-mapping.xsd (which apparently is not used to validate the
mapping, but only provided to support code completion in your xml-
editor)

The order in which you define the elements like cascade and join-
column(s) for the relation-entities is currently important since it is
a sequence, but is this really desired? Why force this order? defining
cascade before join-column would make perfect sense as well, doesn't
it.