documentation for German dependency label inventory

[josefkr]

The documentation for the dependency labels used by the German parser gives the labels and with spacy.explain one can see a disabbreviated form of the labels.

But I didn't manage to find a reference to annotation guidelines or links to papers or treebanks that can be consulted on what the labels are supposed to mean.

As far as I can tell the current inventory of 42 labels is not identical with either Tiger or NEGRA. For instance, spacy's labels for German include avc which is in NEGRA but not in Tiger. The label ag is used by spacy. It is not in NEGRA but it is in Tiger. spacy's inventory also includes dep which is neither in NEGRA nor in Tiger.

Could you steer me towards documentation of the label set that spaCy uses?

Which page or section is this issue related to?

https://spacy.io/models/de

[adrianeboyd]

The dependency labels other than dep come directly from the sources TIGER and Tiger2Dep. I only see avc in one example in the official TIGER Annotationsschema publication, but it's included in the TIGER Introduction and in the TIGER XML header as an edge label ("adverbial phrase component") and I see ~100 occurrences in TIGER v2 (dec05). The TIGER documentation is currently available here: https://www.ims.uni-stuttgart.de/forschung/ressourcen/korpora/tiger/

dep is a placeholder label used by spacy in some cases where no other label fits, usually only for whitespace or as a backoff label in the dependency parser for a few rare cases. It's basically the same as Universal Dependencies dep: https://universaldependencies.org/u/dep/dep.html

[adrianeboyd]

Let me convert this to a discussion...