* The extension must be named after the bundle name and suffixed with

``Extension`` (``AcmeHelloExtension`` for ``AcmeHelloBundle``);

* The extension should provide an XSD schema.

* The extension *should* provide an XSD schema (but will be registered automatically

regardless).

Manually Registering an Extension Class

When not following the conventions you will have to manually register your

When not following the conventions, you will have to manually register your

extension. To manually register an extension class override the

:method:`Bundle::build() <Symfony\\Component\\HttpKernel\\Bundle\\Bundle::build>`

method in your bundle::