From Array Suite Wiki
In Analysis Modules
This specifies the reference genome to be used.
Omicsoft currently supplies the following genomes out-of-the-box from Ensembl:
Users can build new reference libraries using BuildReferenceLibrary.
Represents the reference sequence (i.e. A,C,G, or T)
In Genome Browser
Represents the reference sequence for the genome browser (as ReferenceLibraryID)