Seth Grimes wrote the following article on Stanbol, OpenNLP and such: http://www.cmswire.com/cms/enterprise-cms/iks-means-semantic-intelligence-for-content-management-but-will-it-survive-011848.php
I would highlight this paragraph on page 2: OpenNLP has Apache incubation status, which is a sort-of provisional acceptance by the Apache Software Foundation. It provides only basic NLP functions. It doesn't support extraction of facts, events, or relationships, nor sentiment or pattern-based information such as telephone numbers and e-mail addresses. It appears, however, that FISE should be able to accommodate other annotators, whether installed or invoked via calls to entity-resolution Web services. There are many NLP engines that are more advanced and capable than OpenNLP. I guess a question is whether OpenNLP should be doing any of those things, or just stay focussed on core NLP tasks that other software builds on. Jason -- Jason Baldridge Assistant Professor, Department of Linguistics The University of Texas at Austin http://www.jasonbaldridge.com http://twitter.com/jasonbaldridge
