The Item Should Be Deploy Once ensures that the Item Deployment property for an item is set to DeployOnce. The items to validate are defined in the Additional Properties field.

The default Additional Properties are:

  • /sitecore/system/Workflows
  • /sitecore/system/Modules
  • /sitecore/system/Settings
  • /sitecore/content
  • /sitecore/system
  • /sitecore/media library/Images
  • /sitecore/layout/Placeholder Settings
  • /sitecore/system/Proxies
  • /sitecore/layout/Renderings
  • /sitecore/system/Marketing Center
  • /sitecore/layout/Simulators
  • /sitecore/templates
  • /sitecore/media library
  • /sitecore/templates/System
  • /sitecore/system/Dictionary
  • /sitecore/system/Aliases
  • /sitecore/system/Languages
  • /sitecore/media library/Files
  • /sitecore/layout/Layouts
  • /sitecore/layout/Controllers
  • /sitecore/media library/System
  • /sitecore/layout/Models
  • /sitecore/templates/Branches
  • /sitecore/templates/Branches/System
  • /sitecore/system/Publishing targets
  • /sitecore/layout/Devices
  • /sitecore/layout
  • /sitecore/layout/Sublayouts
  • /sitecore/system/Tasks
  • /sitecore/system/Toolbox

This validator will check only check the items specified in the Additional Properties field, if you need to validate and entire tree of items use validator TDSA008 - Tree Should Be Deploy Once.