Hoq to retrive the Cube Schema metadata information from a cube in sql server analysis services using mdx queries

Hi..

I got a requrement to retrive the cube meta data information in ssas cube , as per my knowledge i retrieve the data using  

SELECT [MEASURE_NAME],[MEASURE_UNIQUE_NAME] FROM  $system.MDSCHEMA_MEASURES

WHERE [CATALOG_NAME]='some x' and CUBE_NAME='EHI'

But my problem is, can i use MDX functions on this query like IIF ,Coalescenonempty,Nonempty,crossjoin, and mainly Memebers creations, if possible plese give the syntaxes for those functions .pls