use of <declare> tag

Hello all,

Page 152 of MathML 2.0 Recommandation states that:


declare takes one or two children.  The first child, which is mandatory,
is the object affected by the declaration.  This is usually a ci element
providing the identifier that is being declared as in:

<declare type="vector"><ci>V</ci></declare>


The word "usually" means it is possible to have something that is NOT a
<ci> as the first arguement.  Can any of you provide some examples?

Thanks!!

Clare

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

clare@scl.csd.uwo.ca