idx,constrain.type,group.by,group.variable,group.option,variable1,relation1,variable2
1,variableCompare,FALSE,,,yrs.since.phd,<,yrs.service
2,instanceCompare,TRUE,rank,Prof,yrs.since.phd,><,salary
3,valueCompare,FALSE,,,salary,=,78182
4,variableCompare,TRUE,discipline,B,yrs.service,=,yrs.since.phd
5,instanceCompare,TRUE,rank,Prof,yrs.since.phd,<>,yrs.service
6,valueCompare,TRUE,discipline,B,salary,<,90000
