When a tag is added, it can trigger an exists rules.

Eg:
highway=residential { add test=yes }

test=* [0x1]
highway=residential [0x2]

Should result in 0x1 and not 0x2.


git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@2785 25d90789-57f7-4ee0-8453-03a3dfeeeb22