1. add individual catalog to indexation service.
NB: each catalog could be referring to particular operational department
2. on this catalog's property, check on "generate abstracts" to enable display of 'Characterization' field
3. add at least one folder to this catalog
NB: this folder has not to be set as virtual folder in the default web site, but if you want to access the found file by clicking on a hyperlink on the result page, then the file will have to belong to a web virtual folder