Calculation Command Group
http://docs.oracle.com/cd/E10530_01/doc/epm.931/html_esb_techref/calc/calcgrup.htm
FIX Function Detail
http://docs.oracle.com/cd/E17236_01/epm.1112/esb_tech_ref/frameset.htm?fixend.html
essbase maxL grammar
ftp://ftp.software.ibm.com/software/analytics/spss/support/In2Quest/DOCS/TechRef/MaxL/language.htm