File created in the Translation Memory Exchange (TMX) format, an open XML standard used for exchanging translation memory (TM) data created by Computer Aided Translation (CAT) and localization applications; may save words or phrases that have been translated from one language to another; used for transferring the translation memory between different tools and vendors.

NOTE: The TMX format was developed by the Localization Industry Standards Association (LISA), who then released the standard under the Creative Commons license.