In this section

CATALOG

How every card in every set is structured.

Brand → Set → Subset → Card

Brand         Upper Deck
  └─ Set        2025-26 OPC Platinum Hockey
      └─ Subset      Young Guns · Future Watch · Base · …
          └─ Card
              ├─ finish       → Finish   (NULL = base; Rainbow, Gold, …)
              ├─ parent_card  → base Card (NULL = this IS the base)
              ├─ print_run    /99, /25, NULL if unnumbered
              ├─ subjects     → [Subject + Team]
              └─ attributes   → [Rookie, Autograph, Memorabilia, …]

A PARALLEL IS JUST ANOTHER CARD

The same slot — the (subset, number, player) position a printing occupies — in a different . A Rainbow McDavid Young Guns and its base are both Cards; the points at its base via parent_card_uuid. No separate parallel table, no special casing.

SUBJECTS & TEAMS

A Card can have several subjects (dual/combo cards). Each subject carries the team they appear with on that card— players change teams, the card doesn't.

ATTRIBUTES

IntrinsicRookie — belongs to the slot, so it's on the base and every parallel.

Printing-specificAutograph, Memorabilia, — only on the exact printing that has it.