Bug in MathML test suite?

I think there is an error in test
 http://www.w3.org/Math/testsuite/Presentation/TokenElements/mo/moAlrspace13.ht
ml

more precisely in the line:

   <mo lspace='2' rspace='1'>+</mo>

A value without any unit for attributes lspace or rspace seems
to be wrong.  The definition of these attributes (section
3.2.5.1 of the MathML 2.0 Rec.) implies that units are mandatory.
There is no brackets around h-unit in the definition, and according
to section 2.4.4.2, only brackets make unit optional.

If my reasoning is right, the last sentence in the Description of
the test is wrong too ("Units should be ems by default"), as there is
no default units for lspace or rspace.

Vincent.
-------------------------------------------------------
Vincent Quint                       INRIA Rhône-Alpes
W3C/INRIA                           ZIRST
e-mail: Vincent.Quint@w3.org        655 avenue de l'Europe
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Received on Friday, 7 December 2001 13:38:27 UTC