# Annotation Glossary

### A

allow-none

  NULL is ok, both for passing and for returning.

### E

element-type

  Generics and defining elements of containers and arrays.

### I

inout

  Parameter for input and for returning results. Default is transfer full.

### O

out

  Parameter for returning results. Default is transfer full.

### S

scope async

  The callback is valid until first called.

scope call

  The callback is valid only during the call to the method.

scope notified

  The callback is valid until the GDestroyNotify argument is called.

### T

transfer container

  Free data container after the code is done.

transfer full

  Free data after the code is done.

transfer none

  Don't free data after the code is done.