RichFaces community is complaining about complexity of maintaining namespaces through the JSF projects [1]

as the sample could be following project file:
https://github.com/richfaces/sandbox/blob/760fca06c7db23b542fa8d077f73dfe3e6dd81c5/bootstrap/demo/src/main/webapp/index.xhtml#L11

It is very hard to maintain namespaces through project.

What are current options when using JBoss Tools?

• modify Facelets file templates for creating new files and list all favorite namespaces there
• use autocompletion of detected namespaces (write xmlns:xyz="..." and autocompletion will offer you available namespaces)

But both of the solutions are not as straight-forward as it could be.

Tools could help and store the preferences for namespaces,
so user would need only to start typing tag with prefix of the namespace (e.g. <a4j: and once he will complete the tag <a4j:ajax>, the namespace will be automatically added to the root of the XML file. (xmlns:a4j="http://richfaces.org/a4j").

The information about the prefixes could be retrieved from:

• faces-config.xml generated by RichFaces CDK: faces-config/faces-config-extension/cdk:prefix
• scanning the Facelets (XHTML) files in a project and collecting used namespace prefixes (xmlns:*)

[1] https://community.jboss.org/message/738739#738739