If an object is created with no ‘Select’ SQL it is has a different icon to the ones used for Measures and Dimensions.
Objects created in this way cannot be used in charts, but they are useful for grouping together objects into categories. In the Chart Editor screen shot below the chevron to the left of ‘Store Information’ has been clicked to display the objects grouped together under that heading.
Objects can be placed into Folder Objects on the ‘Organise’ tab of the Data Connection window, please refer to the section Organise for more information.