How to train a Named Entity Recognition (NER) model?
To train the name finder model you need training data that contains the entities you would
like to detect.
Have a look at our manual, in special the sections under the
Name Finder Training API.
At the beginning of that section you can see how the data has to be marked up. Please note you that you need many sentences to successfully train the name finder.
Will my models trained with a previous version of OpenNLP still work with a newer version?
You should expect it to work. The corpora used is normally the same. However, the behavior may
change when we fix bugs or add new features. The test results in the
project Wiki may contain useful
information about model compatibility.
Is there a commercial license for OpenNLP?
OpenNLP is licensed under the business-friendly Apache software license,
version 2.0. You can read the license
or its Wikipedia page
for more information.