I am a fresh green newbie in XML……
Is possible in Custom style XML to use any kind of constant declaration ?
E.g. if I would want to tweak some zoom levels for chosen groups of tags, not to modify the value on dozens of places.
If there isn't you could use something like http://fart-it.sourceforge.net/ to replace strings in the style-file before using it with Osm2GpsMid.
Until now I have not found a way. I will stick to solution i am familiar with.
NoteTab light Text editor with capable macro language and PCRE regular expressions.
There i can write a script e.g. for removing or modifying of given list of style items, whatever change is done to style-file.
It also would apply to tweaking of bike speed for various "highways", unless some bicycle profiles are implemented.