Diameter AVP Notation
3GPP 32.299 states the following symbols are used in the message format definitions:
- <AVP> indicates a mandatory AVP with a fixed position in the message.
- {AVP} indicates a mandatory AVP in the message.
- [AVP] indicates an optional AVP in the message.
- *AVP indicates that multiple occurrences of an AVP is possible.
This syntax is used to document the Sc Interface messages herein.