Rankinf of Results?

Hi there,

I would like to achieve some kind of rating of the results of a
query. As it searches in different fields of the (metadata) database,
matching keywords of the field of the "data variable names" are more
important than matching keywords in the "description" field...

I have no idea how to achieve that. Could anyone point me into the
right direction?

Thanks for any advice!

Stef