Nominatim comes with a predefined set of configuration options that should work for most standard installations. If you have special requirements, there are many places where the configuration can be adapted. This chapter describes the following configurable parts:

• Global Settings has a detailed description of all parameters that can be set in your local .env configuration
• Import styles explains how to write your own import style in order to control what kind of OSM data will be imported
• Place ranking describes the configuration around classifing places in terms of their importance and their role in an address
• Tokenizers describes the configuration of the module responsible for analysing and indexing names
• Special Phrases are common nouns or phrases that can be used in search to identify a class of places

There are also guides for adding the following external data:

• US house numbers from the TIGER dataset
• External postcodes