Payload, Envelope, and Manifest
Plain-language summary
These terms work together:
- Payload: the machine-readable content; the cargo
- Envelope: the wrapper that carries payload plus metadata
- Manifest: the structured descriptor used to identify and process payload content
How this appears in EPM
In EPM workflows, one payload is carried with metadata so consumer systems can identify, validate, and process content predictably. The producer of the PDF creates the EPM envelope and places it inside the PDF.
Why this matters
- Supports clear producer and consumer expectations
- Improves transport reliability
- Reduces dependence on sidecar file delivery patterns
Common misunderstanding
Envelope and payload are not the same thing. The envelope describes and carries; the payload is the actual content. An AXIS data structure is the content within the context of this website.