## Annotation Glossary

### I

inout

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

### N

not nullable

  NULL must not be passed as the value in, out, in-out; or as a return value.

nullable

  NULL may be passed as the value in, out, in-out; or as a return value.

### O

out

  Parameter for returning results. Default is transfer full.

### S

scope async

  The callback is valid until first called.

skip

  Exposed in C code, not necessarily available in other languages.

### T

transfer full

  The caller owns the data, and is responsible for free it.

transfer none

  The data is owned by the callee, which is responsible of freeing it.