On the syntax of the relative complementizer deto

The object of analysis in the article are the uses of the lexeme дето in colloquial Bulgarian and in written informative and commentary media texts. The research aims at presenting the syntactic features of дето as an indicator of subordinating conjunction in the complex sentences and comparing the functions of дето-clauses in oral texts from everyday informal communication and in written texts from public media sphere. The purpose of the analysis is to make generalizations about the status of дето in Bulgarian oral and written texts.