The sdltb file format is a proprietary database format developed by RWS (formerly SDL) for use with SDL Trados Studio, the industry-standard computer-assisted translation (CAT) software. It serves as the primary container for terminology databases, commonly referred to as termbases. These files store structured linguistic data, including source and target terms, definitions, grammatical information, usage notes, and metadata such as creation dates or subject fields. By organizing terminology in an sdltb file, translators and project managers ensure consistency across large-scale translation projects, as the software can automatically suggest or validate terms during the translation process. The format is built on a relational database structure, typically utilizing SQLite, which allows for efficient querying and high-speed retrieval of linguistic data even when the termbase contains hundreds of thousands of entries. It is essential for maintaining brand voice and technical accuracy in professional localization workflows.