XLIFF (XML Localization Interchange File Format) is an XML-based format created to standardize the way localizable data is passed between different tools during a localization process. It is designed to be a common exchange language for Computer-Assisted Translation (CAT) tools. The primary purpose of XLIFF is to separate the content that needs to be translated from the formatting and structural information of the original document. By encapsulating source text, target translations, and metadata—such as translation status, comments, and context—within a single, structured file, it ensures that translators can focus on the text while preserving the integrity of the original file structure. This format is widely adopted in the software and documentation industry because it allows for seamless interoperability between various translation management systems, translation memory tools, and content management platforms, significantly reducing the complexity and cost of multilingual projects.