In order to be used for sorting and filtering, metadata content elements have to be indexed in a special way, known as a fast index. A fast index is a memory-resident index that can be accessed quickly and which is flexible enough to be used to filter or pre-organize query results. Any content elements that you want to be able to search by must also be defined in the Watson Explorer Engine software, as explained later in Searching Metadata Content.
Metadata content elements that are to be fast-indexed must be identified on a search collection's Indexing tab.
To proceed to the next section of this tutorial, click Crawling and Indexing the Sample Files.