Here is my experiment with moving(copy-paste) xdoc content to javadoc with 
minor changes for:
1) intentation and " * " prefix
2) substitude "source" tag to "pre"
3) conversion of subsection name to "<p>Name of subsection"
4) removal of some "</p>" just to make javadoc tool happy
5) introduction of "caption" tag just to make javadoc tool happy

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Please share your concerns ....