more preference for name-only queries in search

[nominatim.git] / nominatim / api / types.py

diff --git a/nominatim/api/types.py b/nominatim/api/types.py
index 1927f69a7a5bd26f419f235fa9cb4e93b8b5b22d..5767fe1604a7d31e5b1adffdf3699adf8420a439 100644 (file)
--- a/nominatim/api/types.py
+++ b/nominatim/api/types.py
@@ -17,6 +17,7 @@ from struct import unpack
 from binascii import unhexlify
 
 from nominatim.errors import UsageError
+from nominatim.api.localization import Locales
 
 # pylint: disable=no-member,too-many-boolean-expressions,too-many-instance-attributes
 
@@ -311,13 +312,33 @@ class GeometryFormat(enum.Flag):
 
 
 class DataLayer(enum.Flag):
-    """ Layer types that can be selected for reverse and forward search.
+    """ The `DataLayer` flag type defines the layers that can be selected
+        for reverse and forward search.
     """
-    POI = enum.auto()
     ADDRESS = enum.auto()
+    """ The address layer contains all places relavant for addresses:
+        fully qualified addresses with a house number (or a house name equivalent,
+        for some addresses) and places that can be part of an address like
+        roads, cities, states.
+    """
+    POI = enum.auto()
+    """ Layer for points of interest like shops, restaurants but also
+        recycling bins or postboxes.
+    """
     RAILWAY = enum.auto()
-    MANMADE = enum.auto()
+    """ Layer with railway features including tracks and other infrastructure.
+        Note that in Nominatim's standard configuration, only very few railway
+        features are imported into the database. Thus a custom configuration
+        is required to make full use of this layer.
+    """
     NATURAL = enum.auto()
+    """ Layer with natural features like rivers, lakes and mountains.
+    """
+    MANMADE = enum.auto()
+    """ Layer with other human-made features and boundaries. This layer is
+        the catch-all and includes all features not covered by the other
+        layers. A typical example for this layer are national park boundaries.
+    """
 
 
 def format_country(cc: Any) -> List[str]:
@@ -366,7 +387,7 @@ TParam = TypeVar('TParam', bound='LookupDetails') # pylint: disable=invalid-name
 
 @dataclasses.dataclass
 class LookupDetails:
-    """ Collection of parameters that define the amount of details
+    """ Collection of parameters that define which kind of details are
         returned with a lookup or details result.
     """
     geometry_output: GeometryFormat = GeometryFormat.NONE
@@ -393,6 +414,9 @@ class LookupDetails:
         0.0 means the original geometry is kept. The higher the value, the
         more the geometry gets simplified.
     """
+    locales: Locales = Locales()
+    """ Prefered languages for localization of results.
+    """
 
     @classmethod
     def from_kwargs(cls: Type[TParam], kwargs: Dict[str, Any]) -> TParam:
@@ -514,7 +538,9 @@ class SearchDetails(LookupDetails):
                 or (self.bounded_viewbox
                     and self.viewbox is not None and self.near is not None
                     and self.viewbox.contains(self.near))
-                or self.layers is not None and not self.layers)
+                or (self.layers is not None and not self.layers)
+                or (self.max_rank <= 4 and
+                    self.layers is not None and not self.layers & DataLayer.ADDRESS))
 
 
     def layer_enabled(self, layer: DataLayer) -> bool: