TLS - Thesaurus Linguae SericaeTLS offers the functions of a traditional dictionary, full-text database, synonym dictionary etc. But by combining multiple levels of analysis in one overarching structure which is accessible from any possible angle (technically achieved by means of a relational database), the types of questions that can be asked and for which answers can be obtained go far beyond those possible with traditional resources on the history of the Chinese language, whether printed or digital.