Hi Gerd,
my test-style was only a strong simplified
style.
> The lines file you posted ignores
all lies with line_minorstreet=*
If you are interesting for the original
style: http://files.mkgmap.org.uk/download/360/style.zip
In inc\lines_... are a lot of roads,
path and so on.
> ... ways with empty tag values,
e.g. way 148796438 has line_path3=""
That means a way with type "line_path3"
and without a name. The rule for mkgmap is defined in inc\inc\lines_smallway
and mkgmap should take "type 0x11406 level 2".
Frank