Treebank formats and associated software tools are proliferating rapidly, with little consideration for interoperability. We survey a wide variety of treebank structures and operations, and show how they can be mapped onto the annotation graph model, and leading to an integrated framework encompassing tree and non-tree annotations alike. This development opens up new possibilities for managing and exploiting multilayer annotations.
@article{arxiv.cs/0204007,
title = {An Integrated Framework for Treebanks and Multilayer Annotations},
author = {Scott Cotton and Steven Bird},
journal= {arXiv preprint arXiv:cs/0204007},
year = {2007}
}