Abstract
We present a tool for annotation of semantic inter-sentential discourse relations on the tectogrammatical layer of the Prague Dependency Treebank (PDT). We present the way of helping the annotators by several useful features implemented in the annotation tool, such as a possibility to combine surface and deep syntactic representation of sentences during the annotation, a possibility to define, display and connect arbitrary groups of nodes, a clause-based compact depiction of trees, etc.
For studying differences among parallel annotations, the tool offers a simultaneous depiction of parallel annotations of the data.