The incline tag can be defined with the following units. The following has all the same meaning: incline=100 incline=100% incline=45° default is assumed to be %. Now in the style-file having a line checking for incline>90 will catch both incline=100 and incline=100% but not incline=45° It is impossible however to get deegrees translated into percent or to have a line checking for incline>45°

and non numeric character will through an error.

This is not of big importance to me, but the day we have a proper preprocessor available, % values and values with indication should be changed to ° before handing them over to be read by the style-file (not the other way around because 90° is not defined in %).