We present an ongoing implementation of a \ke\space based reasoner for a decidable fragment of stratified elementary set theory expressing the description logic $\dlssx$ (shortly $\shdlssx$). The reasoner checks the consistency of $\shdlssx$-knowledge bases (KBs) represented in set-theoretic terms. It is implemented in \textsf{C++} and supports $\shdlssx$-KBs serialized in the OWL/XML format. To the best of our knowledge, this is the first attempt to implement a reasoner for the consistency checking of a descripti…