We have developed a set of TrEd extensions for GDT related annotation tasks.


TrEd is a graphical editor and viewer for linguistic tree-like structures developed at Charles University in Prague.

You can install TrEd following the instructions from . Then, to install the GDT-related extensions:


You can also install an extension related to coreference annotation:

  • first, install at a minimum the following extensions:
    • Prague Dependency Treebank 2.0 Annotation
    • Bridging Anaphora and Textual Coreference Annotation
    • Non-Dependency Relations Annotation - common features
  • install the gdt bridging extension