As a LIPIcs/OASIcs author, you will be invited by e-mail to register at the Dagstuhl Submission Server. The server will guide you through the publication workflow. Preliminary information can be found here:
A joint cooperation between Trier University/DBLP and Schloss Dagstuhl aims at strengthening the documentation of research publications in Informatics in a comprehensive, transparent, and open accessible manner.