# Annotation Glossary

### S

scope async

  The callback is valid until first called.

### A

array

  Parameter points to an array of items.

### O

out

  Parameter for returning results. Default is transfer full.

### E

element-type

  Generics and defining elements of containers and arrays.

### T

transfer floating

  Alias for transfer none, used for objects with floating refs.

transfer full

  Free data after the code is done.

transfer none

  Don't free data after the code is done.

transfer container

  Free data container after the code is done.

### C

closure

  This parameter is a 'user_data', for callbacks; many bindings can pass NULL here.

### S

scope call

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

### A

allow-none

  NULL is ok, both for passing and for returning.