Common problem we have is that all documents in website have set of properties related to place in which they are stored like Project name, project type, location ........ when indexer indexing documet metadata, properties from web , folders and item should be combined, so we should be able make query and retrieve them. And another limitation is that when we change web properties, this properties are updated pretty slowly it take more than 72hours, properties of newly created websites are indexed in near realtime but not when we update web properties