Hi,

with a old mkgmap version (mkgmap-r4286) i use a rule like that (i use my own classification for polygons):

area_building=""                { name '${addr:housenumber}' }                   [0x01 level 1]
area_building=*                 { name '${area_building}' }                      [0x01 level 2]

If in the OSM-file a line like that

    <tag k='area_building' v='my home' />

it matches and in the map i have a polygon with type 0x01 and the name 'my home'.
The line

    <tag k='area_building' v='' />

it matches and in the map i have a polygon with type 0x01 and the housenumber or nothing as name.

With the actual mkgmap version (mkgmap-r4562) this not work. With v='' i have no match. Is this a error or a feature ;) . How can i match this?


With best regards
Frank Stinner