<?xml version="1.0"?> <!DOCTYPE bindings> <bindings id="testBindings" xmlns="http://www.mozilla.org/xbl" xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:xbl="http://www.mozilla.org/xbl"> <binding id="base"> <content> <xul:box flex="1"> <xul:box class="inner" flex="1"> <children/> </xul:box> </xul:box> </content> </binding> <binding id="inner"> <content> <xul:box flex="1"> <xul:box flex="1"> <children/> </xul:box> </xul:box> </content> </binding> </bindings>