MDX+SSAS #37-Ignore unrelated dimension or not

In Adventure Works cube 2008 or 2012, in the Dimension Usage tab, you will see that many intercepts of measure groups and dimensions are blank. To a specific measure group, the dimensions that have blank intercepts are un-related to the measure group. As a matter of fact you will see blank intercepts more often than not. As the term un-related dimension suggests, these measure groups have no relationship to these dimensions. SSAS, however, gives us a measure group property IgnoreUnrelatedDimensions (true or false) to control how we want these measures to show for those un-related dimension members.