[mkgmap-dev] !< not working -- problem with conditions in style-file.

There is a problem in the style handling. "!<" is not working. Assume I would like to reverse the statement layer<0 into meaning layer < 0 does not exist. Currently I could write layer!=-1 & layer!=-2 and so on. But that sums up to quite a lot of text. Essentially I would like to have the following statement shorter...: & ( tracktype!=1 | tracktype!=2 | tracktype!=3 | tracktype!=4 | tracktypeadded=yes ) but replacing it with & (tracktype!<5 | tracktypeadded=yes ) does not yield the same outcome. Have I got a logical problem, or is it mkgmap?