Rebuilding the DITA-OT documentation

The DITA-OT ships with Ant scripts that enable you to rebuild the toolkit documentation. This is especially helpful if your environment contains plug-ins that integrate additional messages into the toolkit.

Change to the docsrc directory.
Run the following command:
```
ant -f build.xml target
```
The target parameter is optional and specifies a specific transformation type. It takes the following values:
- html
- htmlhelp
- pdf If you do not specify an Ant target, all three output formats (HTML5, HTML help, and PDF) are generated.