Major Description
In http://jakarta.apache.org/tapestry/UsersGuide/components.html#components.libraries.namespace it is stated that components (from framework) can be overriden.
"In fact, it is possible to override both pages and components provided by the framework. This is frequently used to change the look and feel of the default StateSession or Exception page. In theory, it is even possible to override fundamental components such as Insert or Foreach!"
Why is it then not possible to override components within other namespaces? It is, for example, not possible just to override the contrib:TablePages component, while not touching the rest of contrib. There are several inelegant workarounds where you have to copy more or less of the component specs and templates.
If Insert is overrideable, why not "namespace:Insert" for instance? This sound illogical to me and results in copy&paste'ing.
Is this functionality important? To my opinion yes
1) It reduces code & configuration to maintain
2) It allows upgrading of single components within components without the need to touch the whole thing
To solve this, it would be sufficient to allow overriding components in subsequent <library>ies.
<library id="contrib" specification-path="/org/apache/tapestry/contrib/Contrib.library"/>
<library id="contrib" specification-path="/org/my/own/tablePages/component/x.library"/>
This currently results in an error message. "namespace already existent"