Description

According to discussion of SL-13 setDescription needs additionally docblock informations:

Method:
setDefault():

Solution:
ADD A SHORT DESCRIPTION IN THE DOCBLOCK !!!

Information:
Quality is what users can set in their browser... it is defined by HTTP and has a value from 0% to 100%.
This is where the value of 0-1 comes from as it is exactly set the same way in browsers which support this.
These are float values as per definition from HTTP 1.1.