# [bash] export -n ENSEMBL_CVS_ROOT_DIR # will stop exporting, but the value in current shell stays as it was
# [tcsh] unsetenv ENSEMBL_CVS_ROOT_DIR # will destroy the variable even in current shell, and stop exporting
'ensembl_cvs_root_dir'=>$ENV{'ENSEMBL_ROOT_DIR'}||$self->o('ensembl_root_dir')||$ENV{'ENSEMBL_CVS_ROOT_DIR'}||$self->o('ensembl_cvs_root_dir'),# it will make sense to set this variable if you are going to use ehive with ensembl
'ensembl_cvs_root_dir'=>$self->o('ensembl_root_dir')||$self->o('ensembl_cvs_root_dir')||$ENV{'ENSEMBL_ROOT_DIR'}||$ENV{'ENSEMBL_CVS_ROOT_DIR'},# it will make sense to set this variable if you are going to use ehive with ensembl
'ensembl_release'=>Bio::EnsEMBL::ApiVersion::software_version(),# snapshot of EnsEMBL Core API version. Please do not change if not sure.
'rel_suffix'=>'',# an empty string by default, a letter otherwise