[Simple-support] Simple Xml and dynamic ElementListUnion

[PsyKo B. <psy...@gm...>]

Hello,

I'm writing an app using a plugin architecture.
To perform a save of the project, each plugin will store in a container in
the project xml file.
The resulting xml will be something like :
https://gist.github.com/cncgoko/a70e24383e68d7c85022

The existing plugin is unknown at compile time, so the annotation
ElementListUnion  cannot be used. The content of the plugin data will be
XML and probably use annotation as a standard SimpleXml description.
The "owner" attribute of the container will be used to know what plugins
will provide the decoding process for the container.

I'm pretty used to SimpleXml using annotation (@Attribute, @element,...)
for compile time defined xml but I wanted to know if this new case can be
achieved ?

Is there something out of the box ?
If not, can anyone provide at least a clue of the way to do it ? (use
Transformer ?..)

Thank you,
Regards,