http://rxnav.nlm.nih.gov/REST/rxclass/allClasses?classTypes=valueshttp://rxnav.nlm.nih.gov/REST/rxclass/class/byDrugName?drugName=value&relaSource=value&relas=valueshttp://rxnav.nlm.nih.gov/REST/rxclass/class/byId?classId=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/class/byName?className=value&classTypes=valueshttp://rxnav.nlm.nih.gov/REST/rxclass/class/byRxcui?rxcui=value&relaSource=value&relas=valueshttp://rxnav.nlm.nih.gov/REST/rxclass/class/similar?classId=value&relaSource=value&rela=value&scoreType=value&top=value&equivalenceThreshold=value&inclusionThreshold=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/class/similarByRxcuis?rxcuis=values&relaSource=value&rela=value&scoreType=value&top=value&equivalenceThreshold=value&inclusionThreshold=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/class/similarInfo?classId1=value&relaSource1=value&rela1=value&classId2=value&relaSource2=value&rela2=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/classContext?classId=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/classGraph?classId=value&source=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/classMembers?classId=value&relaSource=value&rela=value&trans=value&ttys=valueshttp://rxnav.nlm.nih.gov/REST/rxclass/classTree?classId=value&classType=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/classTypeshttp://rxnav.nlm.nih.gov/REST/rxclass/relaSourceshttp://rxnav.nlm.nih.gov/REST/rxclass/relas?relaSource=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/spellingsuggestions?type=value&term=valuehttp://rxnav.nlm.nih.gov/REST/rxclass/version/{relaSource}