diff --git a/src/discoursegraphs/readwrite/paulaxml/paula.py b/src/discoursegraphs/readwrite/paulaxml/paula.py
index <HASH>..<HASH> 100644
--- a/src/discoursegraphs/readwrite/paulaxml/paula.py
+++ b/src/discoursegraphs/readwrite/paulaxml/paula.py
@@ -8,6 +8,11 @@ containing multiple annotation layers) into a PAULA XML document. Our goal is
 to produce the subset of the PAULA 'specification' that is understood by the
 SaltNPepper converter framework
 
+TODO: _seg files can't have markList type `tok` (rather use the ns as type).
+     `tok` is a reserved type that can only be used in tok files!
+
+TODO: in Tiger (and other dominance graphs, there are no spans, only structs,
+      e.g. struct: NP -> tok1, tok2, tok3)
 """
 
 import os
paula export: added TODOs after consulting Florian