DAXP Terminology

Message
A complete unit of data exchanged between systems in the DAXP protocol.
Each message consists of four main sections: PREAMBLE, HEAD, BODY, and TRAILER.

Tag
A unique numerical or symbolic identifier representing the meaning or purpose of a data element within a message.

Value
The actual data assigned to a specific tag. Together, a tag and its value form the core information unit of DAXP.

Pair
A single tag=value element. Every DAXP message is composed of multiple pairs that together define the message’s content.

Block
A logical grouping of related tag=value pairs representing a specific entity or context, such as a group of parameters or a message section.

PREAMBLE
The opening section of the message that defines protocol version, encoding, and formatting details (e.g., DAXP|V=1|FMT=DEC|ENC=UTF8).

HEAD
The message header containing metadata such as sender, receiver, timestamps, and message identifiers.

BODY
The main data section of the message containing the functional or business content—typically parameters, actions, or events.

TRAILER
The closing section of the message used for validation and integrity control (e.g., checksums).

Parameter
A single, named data element that defines a configurable or measurable value used by applications or microservices.

Parameters Group
A collection of related parameters organized under a common identifier or structure, often representing a logical component, entity, or configuration context.