3. Environment variables

The following environment variables are convenient to use while customizing or extending XXE. However, these variables are not really meant to be used in production.

Notes:

All the scripts used to start XXE (that is, xxe, xxe-c.bat and xxe.jstart, xxeconvert, xxeconvert.bat) automatically define system properties corresponding to the following environment variables. Therefore it's also possible to specify the following variables as system properties rather than environment variables. See other supported system properties below.
You cannot use the following environment variables on the Mac^[36] due to limitations in Apple's Java™ launcher.

Variable name Value Description

XXE_ADDON_PATH

List of directory filenames separated by semi-colons (';').


	Do not forget to clear, or even disable, the Quick Start cache before using `XXE_ADDON_PATH`.

All the directories referenced in this list are recursively scanned by XXE during its startup to dynamically discover add-ons.

Linux example:

~$ XXE_ADDON_PATH="my_docbook;+" xxetool convert \
    docb.toHTML doc.xml -u out

More info in chapter "The lookup phase during XXE startup" of Section 1, “Dynamic discovery of add-ons” in XMLmind XML Editor - Configuration and Deployment.

XXE_FOP_CONFIG

URL or absolute file path of a user-defined FOP configuration file

Specifies the location of a FOP configuration file. More information in Using in XXE an existing FOP configuration file.

XXE_PREFS_DIR

Relative or absolute filename of a directory. A relative filename is relative to the current working directory.

Specifies a custom user preferences directory. This directory is created if it does not already exist.

Linux example:

~$ XXE_PREFS_DIR=test xxe &

XXE_VIEWPORT_SCROLL_MODE

simple|backingstore|blit

Specifies which scrolling mode to use everywhere in XXE.

Linux example:

~$ XXE_VIEWPORT_SCROLL_MODE=simple xxe &

XXE_XEP_CONFIG URL or absolute file path of a user-defined XEP configuration file Specifies the location of a XEP configuration file. More information in Using in XXE an existing XEP configuration file.

^[36]This is the case only with XMLmind.app, the application bundle contained in the .dmg distribution. If you are a local guru or a consultant you may prefer to download and install the xxe-*.zip distribution rather than the xxe-*.dmg distribution.

After unzipping this archive in a directory of your choice, XMLmind XML Editor may be started using the XXE_install_dir/bin/xxe shell script. Unlike XMLmind.app which leverages Apple's Java™ launcher, the xxe shell script makes it easy working with environment variables such as XXE_GUI, XXE_ADDON_PATH, etc.