Hi! I've read in the JsonConfig extension documentation that JsonConfig configuration pages (such as these Tabular Data pages) can be shared across wikis. See Multiple configs shared in a cluster section.
On the other hand, I see in the configuration of Wikimedia servers that JsonConfig seems to have been configured so that configuration pages in the "Data" namespace are stored locally in "Commons", but shared across wikis. Look for the
if ( $wmgEnableJsonConfigDataMode ) block in CommonSettings.php.
I thought this meant I could create a Tabular Data page in "Meta", for example, under Data:Sample.tab, and that it would be stored in Commons. However, it doesn't seem to work that way.
What does "shared across wikis" means, then? I see in the "Map Data" help page that one can use a Map Data page in Commons from any wiki (see Usage section). Is that what "shared across wiki" means?