Author: Anna van Raaphorst
Keywords: installing DITA Open Toolkit, installing, DITA Open Toolkit

# Installing and upgrading DITA Open Toolkit

This chapter contains information on how to install and upgrade DITA Open Toolkit on Windows, Linux/UNIX, and Mac OS X.

- System requirements and supported applications
- Installation overview
- Installing your DITA authoring tool
- Installing the Java JDK
- Installing the DITA Tookit full package distribution
- Installing the DITA Tookit minimal package distribution
- Directories and files in the DITA-OT1.5.3 directory
- Installing on Mac OS X
- Installing the optional tools
- DITAblogs (installing and upgrading)