WWT-format was specially designed for saving the information about preserved words and their attributes.
At present, there are two types of WWT-format:
If you save the list of preserved words in a file of WWT (with formatting) format, the whole list of preserved words will be saved including such attributes as semantic class, transliteration and font format. You will be able to work with this file only in the present version of the translation system (@PROMT Family or PROMT Translation Office 2000).
If you save the list of preserved words in a file of WWT (without formatting) format, only the preserved words with such attributes as semantic class and transliteration will be saved. The preserved words with font format attributes will be lost. You will be able to work with this file both in the present and in the previous versions of the translation system (PROMT 98 or earlier).