0-2-4-understand-dm-004

name	0.2.4-understand-dm_004
description	[0.2.4] document_schema: A formal contract defining the expected payload_structure fields, their types, cardinality, a

understand-dm_004

CALL NUMBER: deep_message.dm_004 DEFINITION: document_schema: A formal contract defining the expected payload_structure fields, their types, cardinality, and optionality for a given business_object_type.

Invoke this skill to understand dm_004 down to its primitives. The RELATIVE ROOT below is the least-fixed-point closure of everything it bundles from — the full import cone, grouped by the lib each prim comes from. Projected from a prover-typed KB (MAP/SWI-Prolog consistency gate): every reference below resolves.

THE RELATIVE ROOT (the import cone, by lib)

from deep_message

• dm_001 (d1): payload_structure: The internal data shape of a document message, comprising typed fields and nested data elements that constitute the complete business data being transmitted.
• dm_002 (d2): semantic_envelope: Metadata wrapper around the payload describing document provenance, intent classification, and temporal context without prescribing receiver action.
• dm_003 (d2): business_object_type: A typed classifier identifying the kind of business entity the document represents, such as purchase_order, invoice, or shipment_manifest.
• dm_005 (d3): content_identifier: A stable unique reference (document_id, correlation token) that identifies this specific document instance across systems and message stores.
• dm_006 (d3): processing_hint: An optional non-directive annotation suggesting preferred handling, urgency, or routing preference without constituting a command.

CONSUMERS (what needs this)

dead_letter_channel, schema_validation

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Projected from the enterprise integration patterns KB (154 concepts / 176 relations) — consistency-typed by MAP; the facet list after the colon IS the cross-lib dependency web.

(leaf — this is an actual skill.)