The version of index, for loading a saved index.

This is not the same as package version.

This needs to change if the encoded format changes. Be careful of updates to Trie package, if Trie encoding format changes this version needs to change as well.

The type of index defaults to using.

It defines the default token transforms and filters.

Index default transform factories.

Index default filter factories.

The default token trimmer transform function creator. Normally applied first in transform functions.

The default token stemmer transform function creator.

The default stop word filter function creator.

Convert Index.Model.SimpleConfig to Index.Model.Config

Filling in default values for fields not in SimpleConfig

This is the definition of the default index configuration.