Table that links article and merchandise category with hierarchies

Hi,

I am searching for a table which links article with merchandise category hierarchies.

For eg in transaction WGUS we are getting the hierarchy levels in a tree , we would like to get the same in table format as below

we have also searched table T023S and it is empty,please suggest a suitable table to retrieve the data ( if there are multiple tables to be joined please explain the same)

Thanks

MHD