add links to official secondary importance file

[nominatim.git] / docs / library / Input-Parameter-Types.md

diff --git a/docs/library/Input-Parameter-Types.md b/docs/library/Input-Parameter-Types.md
index dae560b2929e8a19a91207f685e264e9ae190fe1..9227dc3227756a816a25bc0af4f957dbbe6fcbbd 100644 (file)
--- a/docs/library/Input-Parameter-Types.md
+++ b/docs/library/Input-Parameter-Types.md
@@ -7,8 +7,8 @@ in the query functions of the API object.
 
 The [details](NominatimAPI.md#nominatim.api.core.NominatimAPI.details) and
 [lookup](NominatimAPI.md#nominatim.api.core.NominatimAPI.lookup) functions
-require references to places in the database. Below are listed the possible
-types for place identification. All types are dataclasses.
+require references to places in the database. Below the possible
+types for place identification are listed. All types are dataclasses.
 
 ### PlaceID
 
@@ -49,8 +49,14 @@ types for place identification. All types are dataclasses.
 
 ## Layers
 
+Layers allow to restrict the search result to thematic groups. This is
+orthogonal to restriction by address ranks, which groups places by their
+geographic extent.
+
+
 ::: nominatim.api.DataLayer
     options:
         heading_level: 6
+        members_order: source