• Normal: Implements a unitary operation and is defined by a matrix.
• Measure: Measures a single qubit or the joint parity of a groupt of qubits.
• Channel(sym): Selects a Kraus operator to run (sym is a symbol to store the selected index for POVMs)
• Reset(b): Reanimates a measured qubit to the Bit value b. If b is Unknown, then the qubit is reanimated to its last measured value.
• String: Puts a label in a diagram
• Modify(n): Modifies a parent gate. The modified gate takes n more wires (input qubits) than the parent gate.
• BCOp(n,f): Implements a classically-controlled gate. There are two cases: if n is greater than zero, then the control is logically based on the measured values of n qubits. If n is equal to zero, then the control is logically based on the result of one or more joint parity measurements. In either case, f is the function that determines whether or not to execute the parent gate.
• WrapOp(f): Wraps multiple gates into one logical gate. This is used for multi-level circuit drawing.
• WrapHam(pqrs,f): Wraps multiple gates into a single Hamiltonian term. This is used for GrowSingle.

Reference