<ci> with <sep/>

Hello all,

I am wondering the followings are valid Content MathML:

<ci type="complex-cartesian">x<sep/>y</ci>

<ci type="rational">x<sep/>y</ci>

<ci type="complex-cartesian">x<sep/>y</ci>

<ci type="complex-cartesian">3<sep/>y</ci>

<ci type="rational">x<sep/>3</ci>


Obviously, x and y are identifiers in the cases above.  How about:

<ci type="rational" base="16">a<sep/>b</ci>

In this case, a and b can be a hex number!


Can anyone here suggest a better way to handle <ci>s using <sep/>?

thanks!


Clare

============
Clare M. So
Summer Undergraduate Assistant
Ontario Research Centre for Computer Algebra (ORCCA)
University of Western Ontario
London, Ontario, CANADA

clare@scl.csd.uwo.ca