The admin interface ensures that every time a document has been added or modified, it will be made searchable by looking for a directory.tkl file in the current directory or in any parent directory. If the file is to be made searchable, the indexing program is called to immediately add the the file to the index files of the search function. You can also, from the admin interface, perform a total re-indexing of the entire portal (for instance, if you have changed the directories which are to be searchable).