As part of Advanced XML deprecation in Splunk Enterprise 6.3, the Module System is also deprecated.
For more information, see Advanced XML Deprecation
The Module System is a set of core Splunk Enterprise software and architecture principles for feature reuse in Splunk apps and add-ons. Module System extension points provide hooks into framework modules, MVC components and patterns, and AJAX to support custom application development.
This term applies to advanced xml.
A module system is a basic artifact that implements application functionality, including UI features. Every item in a Splunk XML view is a module system. The view XML defines the relationship between module systems by providing structure and behavior for the application.
Core modules included with the Splunk Enterprise distribution reside in the
$SPLUNK_HOME/share/splunk/search_mrsparkle/modules/ directory. You can list all module systems by viewing
http://host:port/modules in your browser.
For more information