# Localize Ecto v0.3.0 - Table of Contents > Locale-aware PostgreSQL ICU collation for Ecto queries: COLLATE query expressions resolved from Localize language tags, and migration helpers for creating collations. ## Pages - [Localize Ecto](readme.md) - [Changelog](changelog.md) - [License](license.md) - Guides - [Using Localize Ecto](using_localize_ecto.md) - [Collations in PostgreSQL](collations_in_postgres.md) ## Modules - [Localize.Ecto](Localize.Ecto.md): Locale-aware query expressions for Ecto on PostgreSQL. - [Localize.Ecto.Audit](Localize.Ecto.Audit.md): Audits the PostgreSQL server's collation and Unicode state against the running application. - [Localize.Ecto.Collation](Localize.Ecto.Collation.md): Resolves a locale to the name of a PostgreSQL ICU collation. - [Localize.Ecto.Migration](Localize.Ecto.Migration.md): Migration helpers for creating PostgreSQL ICU collations. - [Localize.Ecto.TextSearch](Localize.Ecto.TextSearch.md): Resolves a locale to the best matching PostgreSQL text search configuration. - [Localize.Ecto.Type.TimeZone](Localize.Ecto.Type.TimeZone.md): An `Ecto.Type` for IANA time zone identifiers, validated against the CLDR zone inventory. ## Mix Tasks - [mix localize.ecto.audit](Mix.Tasks.Localize.Ecto.Audit.md): Audits the PostgreSQL server's collation and Unicode state against the running application.