Add subclass of paths in transportation

layers/transportation/layer.sql

@@ -18,6 +18,9 @@ ramp int, oneway int, brunnel TEXT, service TEXT) AS $$
         END AS class,
         CASE
             WHEN railway IS NOT NULL THEN railway
+            WHEN (highway IS NOT NULL OR public_transport IS NOT NULL)
+                AND highway_class(highway, public_transport) = 'path'
+                THEN COALESCE(NULLIF(public_transport, ''), highway)
             ELSE NULL
         END AS subclass,
         -- All links are considered as ramps as well

layers/transportation/transportation.yaml

@@ -38,9 +38,11 @@ layer:
       - ferry
     subclass:
       description: |
-          Distinguish more specific railway classes:
+          Distinguish more specific classes of railway and path:
           Subclass is value of the
-          [`railway`](http://wiki.openstreetmap.org/wiki/Key:railway) tag.
+          [`railway`](http://wiki.openstreetmap.org/wiki/Key:railway),
+          [`highway`](http://wiki.openstreetmap.org/wiki/Key:highway) (for paths), or
+          [`public_transport`](http://wiki.openstreetmap.org/wiki/Key:public_transport) (for platforms) tag.
       values:
       - rail
       - narrow_gauge
@@ -50,6 +52,14 @@ layer:
       - light_rail
       - monorail
       - tram
+      - pedestrian
+      - path
+      - footway
+      - cycleway
+      - steps
+      - bridleway
+      - corridor
+      - platform
     brunnel:
       description: |
           Mark whether way is a tunnel or bridge.