So i made a little same area of the trials data.
I think i still need to update the big chart.
I have the tags i used posted to my main google docs chart, that's because the list of features is gonna be BIG and un-managable with the wiki.

I just the 'Validator' plugin with helps, as it squaks when something isn't right.
Like duplicate nodes...
I probably need to use the python script.. as now i know how (kind of) to edit it.
...
I put it as highway=path

osm.org/browse/way/44817089

the 'LIO:surface' tag wasnt' added. In some of the source tags it's listed as 'Grass/Natural' for example. Which is rather ambiguous. So the area needs to be physically surveyed anyway (to get more features)