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The definition of points= of att.coordinated seems to be in error.
Because Sourceforge will almost assuredly muck up the formatting of example code, I've put the details in an attached files, and will ask Laurent to forward to Council.
Details of "error in definition of points=?" bug report
the definition of @points has been changed to
<datatype minOccurs="3" maxOccurs="unbounded">
where data.point is defined as
<data type="token" xmlns="http://relaxng.org/ns/structure/1.0">
I believe that this deals with the concern expressed here.