1 # Input Parameter Types
3 This page describes in more detail some of the input parameter types used
4 in the query functions of the API object.
6 ## Place identification
8 The [details](NominatimAPI.md#nominatim.api.core.NominatimAPI.details) and
9 [lookup](NominatimAPI.md#nominatim.api.core.NominatimAPI.lookup) functions
10 require references to places in the database. Below are listed the possible
11 types for place identification. All types are dataclasses.
15 ::: nominatim.api.PlaceID
21 ::: nominatim.api.OsmID
27 ::: nominatim.api.GeometryFormat
36 ::: nominatim.api.Point
39 show_signature_annotations: True
43 ::: nominatim.api.Bbox
46 show_signature_annotations: True
48 group_by_category: False
52 Layers allow to restrict the search result to thematic groups. This is
53 orthogonal to restriction by address ranks, which groups places by their
57 ::: nominatim.api.DataLayer