SMW 1.0 has changed some basic things in how SMW works, for example:
* the Relation: namespace became obsolete, and
* <ask> was replaced by #ask with a cleaner syntax and better interaction with
For backwards compatibility, we have still kept the now obsolete features. But
it is not very convenient that all new SMW installations still have a
Relation namespace (that shows up on Special_Search etc.) and also things
like the *-print requests in queries do not work very well with new SMW
features (e.g. the new Special:Ask has a separate field for ?printouts).
Therefore, all future SMW versions will by default disable SMW<1.0 specific
features. If you have a wiki where old features are still in use, you can
reenable them by setting $smwgSMWBetaCompatible = true; in LocalSettings.php.
You can switch this on and off as you like -- it does not make any permanent
changes in the wiki (of course, switching namespaces on or off affects links
in the wiki, and you may want to run MediaWiki's refreshLinks.php if you have
links to [[Relation:...]]).
I also ask all developers to check whether their code requires things like
<ask> or [[property::*]] to work as in SMW 0.7, and to update to the current
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