[XML Schema 1.1] Why is it called precisionDecimal? Why isn't it called precisionFloat? Or precisionDouble?

Hi Folks,

A precisionDecimal value is a decimal value, and its precision is inferred from how it is lexically expressed. Here's a legal precisionDecimal value:

   3.00e2

But this is not a legal xs:decimal value. It looks more like a float or double value.

Why isn't it called precisionFloat, or precisionDouble?

/Roger