Transcendental Pi !!

Hi,

I have some trouble with Presentation MathML specs.

Under the section:

3.2.6.4 Mixing text and mathematics

it puts
<mo> there exists </mo>
<mo> such that </mo>
(so I assume that content decides what tag to put)
but at the same time you say:
<mi>&pi;</mi> (= 3.14...)
which I feel should be <mn>&pi;</mn> and <mn>&ee;</mn>.
Of course it would be much better if we had an entity like
&TransendentalPi; (&tpi;).

Regards

S.K.Venkatesan
TnQ Books & Journals, Chennai