interleaved serialisation
Definition
Serializations of different types interleaved in an overarching format
CESR related
One extremely useful property of CESR is that special count codes enable CESR to be interleaved with other serializations. For example, Many applications use JSON RFC4627, CBOR RFC8949, or MsgPack (MGPK) to serialize flexible self-describing data structures based on field maps, also known as dictionaries or hash tables.
Source IETF-CESR