The indexed attribute is a Boolean field that instructs Watson™ Explorer Engine to either index (true) or not index (false) a content element for full-text searching. This attribute can be added to content elements via the use of custom converters, or as part of content elements that are pushed to an index via the API, using indexed="true|false". If the indexed attribute is not specified for a content it is considered true. Therefore, the indexed attribute need only be specified when false.
Note: If weight="-1" is specified for a content element, the indexed attribute is ignored. If both indexed="false" and action="index-only" are defined in a content element, the content is automatically discarded by the indexer.