xml-dev - Schema Question: decimal including INF??

[Imran Rashid <imranr@wolfram.com>]

I'm a complete newbie w/ Schema's, so this might be a dumb question.

I have a datatype that can be a decimal of arbitray precision, or it can be
+/- infinity.
    since its arbitrary precision, my first instinct was to go to the
decimal datatype.  However, it seems to me that INF is only defined for
double and float, not decimal.
    I know I could define my own datatype, that is either a decimal or the
string "INF".  However, I was thinking that with the float and double types,
presumably another application would see "INF" and interpret it as infinity.
If "INF" is matched on a string, though, the application would simply see
the literal string "INF".

    if the arbitrary precision is not extraordinarily important, am I better
off just using the double type?

thanks,
Imran Rashid