beenletian / caevo

A temporal ordering system for events and time expressions in written text.

This software is released under the Apache License, Version 2.0. See LICENSE in the project root directory for all details. Portions of this software were originally developed at the United States Naval Academy as NavyTime, and then expanded into CAEVO at the 2013 SCALE Workshop at Johns Hopkins University. Software from Steven Bethard's ClearTK system is also included as separate sieves.

We make note that this software uses Stanford's CoreNLP library which is under a GPL v2.0 license. If you use CAEVO as-is, the software is governed instead by the GPL v2. If you wish to use CAEVO under the Apache License, you need to replace the CoreNLP dependency with a non-GPL library.

CAEVO

CAEVO: Cascading EVent Ordering System

A TempEval-style system for extracting temporal entities (events and time expressions), and labeling the temporal relations between the temporal entities. More details can be found here:

http://www.usna.edu/Users/cs/nchamber/caevo/

Prerequisites

CAEVO uses the WordNet dictionaries. The dictionary files can be downloaded from:

http://wordnetcode.princeton.edu/wn3.1.dict.tar.gz

You also need a jwnl_file_properties.xml file that points to the location of your downloaded dictionary. The dictionary and this file can be stored anywhere on your drive. CAEVO looks for an environment variable JWNL that should have the path to the xml file.

For convenience, you can also download and install the directories with the provided shell script (there is a sample jwnl_file_properties.xml file in src/test/resources):

./download-wordnet-dictionaries

Building

mvn compile
mvn test
mvn install