schema_version: "1.0"
sources:
  - citation_key: handbook-2026ed
    type: institutional-document
    published_date:
      value: "2026-09-15"
      precision: day
      open_ended: false
      provenance:
        method: crossref_lookup
        confidence: high
    effective_date_range:
      start:
        value: "2026-09-15"
        precision: day
        open_ended: false
        provenance:
          method: crossref_lookup
          confidence: high
      end:
        value: null
        precision: unknown
        open_ended: true
        provenance:
          method: user_override
          confidence: high
events: []
