Exploratory learning versus Inquiry learning, where is the difference?

You may have recently received the call for the ITS 2012 workshop on "Intelligent support for exploratory environments: exploring, collaborating and learning together" which central object is the designed implementation and use of Exploratory Learning Environments (ELEs).

An occasion to ask whether there is a significant difference between Exploratory learning and Inquiry learning. Both terms are used, do they share meaning or is there a nuance I miss?