Abstract
ZNAK is a Czech Sign language vocabulary, allowing searching in both Czech language and Czech sign language. It is targeted on all people, hearing or deaf, interested in learning Czech sign language. It is possible to search for signs according to its notational transcription, used by Faculty of Arts at Charles University, Prague. This notational transcription is also possible to visualise using virtual X3D avatar. The vocabulary is available free of charge and it is possible to use and modify it freely according to GNU GPL licence