This preface points you to changes in Oracle Text for this release.
The changes in Oracle Text for Oracle Database 12c Release 2 (12.2) are described in this topic.
The new features introduced in this release for Oracle Text are listed and described in the New Features section of Oracle Text Application Developer's Guide.
For a complete list of new features for Oracle Database 12c, see Oracle Database New Features Guide.
The deprecated features for Oracle Database 12c Release 2 (12.2) are described in Oracle Database Upgrade Guide.