Dictionaries provided by XMLmind are delivered either in Dictionary Archives with a .dar extension, which are actually jar files.

There is one .dar for each language available (currently English, French, German, Spanish) plus an archive that gathers all languages (dicts.dar) which can be used for example in Java™ Web Start applications.

There is a simple conventional structure for these archives: the language name appears as a directory, the actual dictionaries are elements of these directories. This corresponds with the dictionary naming convention used in XMLmind Spell Checker.

A .dar archive can contain several languages. For example here are the contents of en.dar (English with country variants):

en/
en/base.cdi
en/allvar.cdi
en/default
en-CA/
en-CA/default
en-CA/spec.cdi
en-GB/
en-GB/default
en-GB/spec.cdi
en-US/
en-US/default
en-US/spec.cdi

As of version 1.1p3, it is also possible to access an dictionary using any URL supported by the Java Runtime Environment.