Dear List, I've just heard of ORM (Object Relational Mapping) frameworks written for PHP. It seems that there are two major frameworks here: Doctrine and Propel: http://www.phpdoctrine.org/ http://propel.phpdb.org/trac/ I wonder which one is better? What is the difference between these? I'm talking about the learning curve, peroformance. What are the advantages/disadvantages of each one? Thank you in advance, Behzad