From time to time happens that I need to extract metadata informations from Analysis Services DMVS in order to quickly get an overview of the entire situation and/or drill down to detail level. As a memo I post the link I use most when need to get documentation on SSAS Objects Data DMVs:

SSAS: Using DMV Queries to get Cube Metadata
http://bennyaustin.wordpress.com/2011/03/01/ssas-dmv-queries-cube-metadata/

SSAS DMV (Dynamic Management View)
http://dwbi1.wordpress.com/2010/01/01/ssas-dmv-dynamic-management-view/

Use Dynamic Management Views (DMVs) to Monitor Analysis Services
http://msdn.microsoft.com/en-us/library/hh230820.aspx