SDLXLIFF
*.Sdlxliff is an XLIFF format, compliant with XLIFF version 1.2.
SDL has added some standards compliant proprietary extensions.
When you add a translatable item to a project in SDL Trados Studio, Studio converts the item into an
*.sdlxliff format file, and preforms all subsequent translation work on the *.sdlxliff file. For example, when you use a Translation Editor, you edit an *.sdlxliff file, and you save the result also as an *.sdlxliff file. The *.sdlxliff file has the same name as the source item but with an added file extension .sdlxliff.
At the end of the project, or when the user generates a final format for review, the translated text is extracted and converted to the destination file format. Usually, the *.sdlxliff working file is kept intact.