The file is getting deployed in crxde but namespace is not getting registered. Also tried creating listener but it doesn't seem to work either.

How do we register namespace through .cnd file in AEM ?I followed Namespace | Content Management  and tried putting .cnd file in /apps/cq and uploaded through "mvn clean install -PautoInstallPackage" but no luck.My .cnd file has this line "<demo='demo'>".Please help with the issue.