BridgeSupport [1] is new functionality in Leopard that makes the current Haskell Objective-C bindings (HOC) obsolete (almost). --- The metadata is intended to be a resource for use beyond bridging. Most frameworks on the system provide two chunks of XML BridgeSupport metadata; succinct and full. The succinct version contains all of the metadata not provided by the Objective-C runtime (which provides about 80% of what is necessary to do full fidelity calls in / out of Objective-C via libffi). The full version contains just that, the full metadata required to describe the APIs of the framework, including all the bits that could be gleaned at runtime. --- BridgeSupport makes it unnecessary to parse Cocoa headers since all the required data is right there in plain XML [2]. It's no longer necessary to bundle libffi with HOC either since Leopard comes with a much improved version. I hereby propose to close up the old HOC project on SourceForge and set up a new one at GoogleCode. I already did this but GoogleCode noticed the SF project and is now waiting for permission from Wolfgang and Andre. Thanks, Joel [1] http://www.friday.com/bbum/2007/10/27/pyobjc-20-pyobjc-in-leopard/ [2] /System/Library/Frameworks/AppKit.framework/Resources/ BridgeSupport/AppKitFull.bridgesupport -- http://wagerlabs.com