BABOK guide: RE from the perspective of business analysis

Looking for a nice compilation of definitions, relevant knowledge areas, techniques around business analysis and requirements engineering? It should be readily available and you would like to look into it for free?

I just stumbled across the Guide to the Business Analysis Body of Knowledge (BABOK Guide) from the International Institute of Business Analysis (thanks RĂ¼diger and Andrea for the push in the right direction!). The BABOK guide is available as a google book, put it also exists as a print book.

More information about the (free) availability of the BABOK guide can be found here.