See slide #5 onwards of: http://www.cis.upenn.edu/~bcpierce/papers/harmonyslides...

		lenidot on July 10, 2013 \| parent \| context \| favorite \| on: Two Open-source Emails a Day for Five and a Half Y... See slide #5 onwards of: http://www.cis.upenn.edu/~bcpierce/papers/harmonyslides-2003... It explains the terms and explores the pros and cons of each approach.