Selling titles

A selling title is a daypart package's name: whatever the seller says it is. Definitions differ per network, change quarter to quarter (or mid-quarter), and can be date-bounded, so holiday, weekday, and weekend schedules are simply versions:

{
  "package_id": "acme-prime",
  "type": "daypart",
  "network": "ACME",
  "definition": {
    "selling_title": "Prime",
    "days": ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
    "start": "20:00",
    "end": "23:00"
  },
  "taxonomy_version": "acme-2026q4-v1",
  "effective": {
    "start": "2026-09-28",
    "end": "2026-12-27"
  },
  "sm_daypart": "Primetime"
}

sm_daypart is reporting normalization only: it maps the seller's title onto Switchboard's fixed reporting dayparts and never constrains the definition. The full field reference lives at the package object.

Orders pin taxonomy_version, so a definition change between plan and order can never silently break reconciliation.