On Fri, Mar 27, 2015 at 12:04 PM, Darran Lofthouse <darran.lofthouse@jboss.com> wrote:

If we can document a way EAP users can use EAP 6.4 and JBoss AS7 /
WildFly users can use WildFly 9.0.0.Final in admin only mode to read in
legacy config and write it as the latest then technically no one should
be blocked if they happen to use a schema version now removed.

Yes I think documenting migration paths is a way to go. Also Windup project can help here.

A general issue with parsers is we have them loaded for all versions
ever supported, could this be an opportunity to switch to some form of
factory so that appropriate versions can be loaded on demand.

That is good point. We should address this as well as a proper way for registering transformers,

given that currently only way to do it is via intentionally deprecated API.

Both of this things go to same category, registering / defining extension.