hi:
Do you possibly mean "heterogeneous" or "heterogeneity" ??????
http://en.wikipedia.org/wiki/Heterogeneity
http://en.wikipedia.org/wiki/Study_heterogeneity
I don't find "heterogenes" in my dictionary:
But this paper talks about SAS and issues of heterogeneous data versus homogeneous data for analysis:
http://www2.sas.com/proceedings/sugi26/p176-26.pdf
Perhaps it will help or at least point you in the right direction. Another idea is to talk to other students or professors in your same field of study at your school. You might find someone who currently uses SAS and you could ask them what procedures they use/used to perform their data analysis.
cynthia