Field Inheritance Across Fragments

inherits_from (Optional)

The inherits_from key allows an SDT fragment to declare explicit field-level inheritance from one or more other fragments. This enables modular composition of memory without repeating stable facts—especially when multiple fragments describe the same entity or belong to the same digest.

inherits_from:
  - fragment: fragment-h5521-290-0-landscape
    fields:
      - plan_name
      - contract_id

Field Definitions

Key	Required?	Description
fragment	✅	ID of the source fragment to inherit from
fields	✅	List of id values to copy from the referenced fragment

Use Cases

• Reference common fields like plan_name or contract_id from a shared base fragment
• Reduce duplication in DataFragments or DirectoryFragments that reuse structural fields
• Enable modular retrieval and memory stitching in multi-fragment digests

Retrieval & Export Behavior

Fields referenced via inherits_from may be:

• Rendered by client UIs during display
• Included in structured export bundles (e.g., JSON-LD, TTL)
• Evaluated by agents for citation, scoring, or field merging logic

Best Practices

• Only inherit static, non-sensitive fields that are display-safe and semantically clear
• Avoid inheriting derived or volatile fields unless their integrity is validated
• Prefer inheritance between fragments sharing the same entity identifier
• Include fallback content for agents operating without multi-fragment context