# Configuration

Reference list of DITA-OT configuration properties.

The lib/configuration.properties file is used to store configuration properties for DITA-OT and plug-ins. The configuration properties are available to both Ant and Java processes, but unlike argument properties, they cannot be set at run-time.

The lib/org.dita.dost.platform/plugin.properties file is used to store configuration properties set by the integration process. The file is regenerated from plug-in configuration each time the integration process is run and should not be edited manually.

## Common properties

`default.language` | Default language. Allowed values are those defined in IETF BCP 47, Tags for the Identification of Languages.

## PDF properties

`org.dita.pdf2.index.frame-markup` | FrameMaker index syntax processing. Allowed values are "true" — FrameMaker index syntax processing "false" (default) — normal DITA 1.2 index syntax processing
`org.dita.pdf2.i18n.enabled` | I18N font processing. Allowed values are "true" (default) — I18N processing is enabled "false" — I18N processing is disabled
`org.dita.pdf2.use-out-temp` | Legacy temporary file mode for generating topic.fo and graphics into output directory. Allowed values are "true" — use output directory for XSL FO file processing "false" (default) — use tempory folder for XSL FO processing

Parent topic: DITA Open Toolkit User Guide