In http://microformats.org/wiki/hreview-aggregate
it says:
rating. required. fixed point integer [1.0-5.0], with optional alternate worst (default:1.0) and/or best (default:5.0), also fixed point integers, and explicit average.
What is a fixed point integer? Maybe that means integer? Why is 1.0 or 2.5 or 5.0 also called a "fixed point integer"? Because integer has no decimal part.
As cdhowie said, they likely mean fixed point number
To answer you question with that adjustment to the original statement, a fixed point number is one with a finite amount of decimal precision. This precision is guaranteed. If you may or may not be aware, floating point numbers used a complex approximation system to store the value which leads to the interesting results you sometimes see. 1.01 for example actually evaluating as 1.00999999999999998
A fixed point value has guaranteed accuracy to a specific number of digits after the decimal.
You can find more information on theory and implementation of fixed point values here: http://en.wikipedia.org/wiki/Fixed-point_arithmetic
They have their terminology wrong. They meant fixed-point number, not integer.
