Via http://sade.textgrid.de/ a test instance is available. User can start there without a local installation and try out the documents of interest. We do not guarantee for the safety and availability of the documents stored in the reference instance and all data is erased occasionally. To use this service register via http://sade.textgrid.de/exist/apps/SADE/textgrid/sign-up.html. We send an email to the provided address with all data necessary to configure the Lab plug-in.