| NDiscriminator of loc * nterm
| NInverter of loc * string * nterm * bool list option * nterm option
| NUnivConstraint of loc * NUri.uri * NUri.uri
| NCopy of loc * string * NUri.uri * (NUri.uri * NUri.uri) list
| NDiscriminator of loc * nterm
| NInverter of loc * string * nterm * bool list option * nterm option
| NUnivConstraint of loc * NUri.uri * NUri.uri
| NCopy of loc * string * NUri.uri * (NUri.uri * NUri.uri) list