# PackageKit Specification

PackageKit is a D-Bus abstraction layer that allows the session user to manage packages in a secure way using a cross-distro, cross-architecture API. PackageKit is built using a lightweight backend architecture. PackageKit is product and vendor neutral and is currently being developed by a small team of developers.

This part documents core features of PackageKit.

## Annotation Glossary

### A

array

  Parameter points to an array of items.

### E

element-type

  Generics and defining elements of containers and arrays.

### 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.

skip

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

### T

transfer container

  The caller owns the data container, but not the data inside it.

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.