\ProvidesFile{iso-authoryear.dbx}[2016/05/13 v0.3.1 biblatex data model extension] \RequireBiber[3] \DeclareDatamodelFields[type=list,datatype=name]{supervisor} \DeclareDatamodelFields[type=field,datatype=literal]{classification} \DeclareDatamodelEntryfields[thesis]{supervisor} \DeclareDatamodelEntryfields[patent]{classification}