[developers] questions about PET/ERG system

Xue, Ping ping.xue at boeing.com
Wed Apr 8 17:53:22 CEST 2015

I am looking at the parse trees (and the MRS representations output by the PET/ERG system, trying to do some grammar engineering to cover our special data. One of the things is that we have to allow "the unknown word handling". We used the command-line option -default-les=all. I wonder what the other possible values are for this option. While allowing "unknown word handling",  we hope to constrain it in some way. I would appreciate it if you could give me some insights or point me to some documentation. I would also appreciate detailed documentation about the notations used in the output of the PET/ERG system, namely the parse trees, MRS representations, etc generated by the system. I can guess quite a bit but not all.

Ping Xue
Boeing Research & Technology
PO Box 3707 MC 7L-43
Seattle, WA 98124-2207
(425) 373-2861

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