.. SPDX-FileCopyrightText: 2021 Open Networking Foundation <info@opennetworking.org>
.. SPDX-License-Identifier: Apache-2.0

Glossary
========
- DBUF: Software service responsible of implementing the UPF Downlink buffering feature
- DDN: Downlink Data Notification
- PCP: Programmable Control Plane team, now merged with PDP into SD-Fabric
- PDP: Programmable Data Plane team, now merged with PCP into SD-Fabric
- QFI: QoS Flow Identifier
- TOST: Trellis, ONOS, Stratum and Tofino, the predecessor of SD-Fabric (now obsolete)
- TNA: Tofino Native Architecture
- UPF: 5G User Plane Function
- UP4: P4 implementation of UPF of control-stack based on ONOS