About .TTX File Format
To work with TTX files in Anycount, let’s get to know a little more about this format.
A proprietary format of SDL Trados Studio. TradosTag, or TTX, contains not only the text and its translations, but also tags and formatting information of the source document. The TradosTag editor is bundled with DSL Trados Studio.
TTX. files can be created from a variety of file types, including .HTML, .JSP, .ASP, .XSL, .XML, .SGML, .RTF, and .DOC.
Link:
SDL Trados