Hi, Just wanted to share this tip. Imagine that you need to write a new module but it requires some dependency on xwiki-core and xwiki-core also needs to use this new module... This is often the case since we haven't moved the model to a new module yet. So how do you solve this circular dependency? Solution: * In your new module, create a component interface to isolate the new code from xwiki-core * Use component to lookup the implementation. This will only be resolved at runtime. * Implement the component interface in xwiki-core Hope it'll help someone -Vincent