ui.modern.form.rss.content_type Background This is the content type for the RSS template. See ui.modern.form.content_type. Setting the key Set this configuration key in the search package or data source configuration. Use the configuration key editor to add or edit the ui.modern.form.rss.content_type key, and set the value. This can be set to any valid String value. Default value ui.modern.form.rss.content_type=application/rss+xml