Hi Huib,

However, using 8.2 I managed to load the entire Dutch legislation documents into 5 separate databases. Yay!

Good to hear!

Anyway, and I must confess I am a bit lazy here, how do I run a query over multiple databases/collections in BaseX? Of course I would like to run the same dumb count query in BaseX too, over these 5 databases containing all my data, see if it works...

This could be a solution:

count( for $name in ('laws1', 'laws2') return db:open($name)//law )

This could be another:

count( for $i in 1 to 5 let $name := 'laws' || $i return db:open($name)//law )

This is a third (it may be the fastest one, because the dynamic binding of database names in the first 2 queries prevents some optimizations to be triggered):

sum( for $i in 1 to 5 let $query := 'count(db:open("db' || $i || '")//law)' return xquery:eval($query) )

Hope this helps, Christian