Hi Bernd,

I think the no-dup-rule-evaluation-v2.patch solves this problem.
The logging function for the style stats now shows more clearly
how a single rule in the style file is translated into one or more rules,
e.g. (a |b | c) & (e | f) { action xyz}
is translated to
(a ) & (e | f) { action xyz}
(b) & (e | f) { action xyz}
(c) & (e | f) { action xyz}

Without the patch it is possible that each part is executed.

The style stats will now look like this:
INFO: uk.me.parabola.mkgmap.osmstyle.stats  63240001.o5m: points stats (rule/evals/true) rule-id: 16 ((($public_transport='platform')&($ref=*|$route_ref=*)) | ((($highway='bus_stop')|(($railway='tram_stop')|(($railway='halt')|($railway='station'))))&($ref=*|$route_ref=*))) {set ref='${ref}(${route_ref})';}/95/60
INFO: uk.me.parabola.mkgmap.osmstyle.stats  63240001.o5m: points stats (rule/evals/true) rule-id: 16 ((($highway='bus_stop')&($ref=*|$route_ref=*)) | ((($railway='tram_stop')|(($railway='halt')|($railway='station')))&($ref=*|$route_ref=*))) {set ref='${ref}(${route_ref})';}/984/490
INFO: uk.me.parabola.mkgmap.osmstyle.stats  63240001.o5m: points stats (rule/evals/true) rule-id: 16 ((($railway='tram_stop')&($ref=*|$route_ref=*)) | ((($railway='halt')|($railway='station'))&($ref=*|$route_ref=*))) {set ref='${ref}(${route_ref})';}/0/0
INFO: uk.me.parabola.mkgmap.osmstyle.stats  63240001.o5m: points stats (rule/evals/true) rule-id: 16 ((($railway='halt')&($ref=*|$route_ref=*)) | (($railway='station')&($ref=*|$route_ref=*))) {set ref='${ref}(${route_ref})';}/11/11
INFO: uk.me.parabola.mkgmap.osmstyle.stats  63240001.o5m: points stats (rule/evals/true) rule-id: 16 # Part of the previous OR expression: ((($railway='station')&($ref=*|$route_ref=*))) {set ref='${ref}(${route_ref})';}/23/9

Gerd