Show Ontology x PeriodO Crosswalk v001

Ten PeriodO-conformant period definitions in two authorities: five narrative-era periods (story time Olivia crawls through, one per omc:NarrativeScene) and five capture/playback-medium periods (historical availability window of each capture technology, per the locked Technical Era Spec), joined by oscx:depictedVia and bound to the production graph by UUID.

Audience: MovieLabs / EBU / RAI standards reviewers + osc pipeline.

Key claim

Demonstrates a real OMC v2.8 gap: story time has no OMC class (the graph’s time:hasTemporalExtent ProperIntervals are empty blank nodes), while capture time IS modeled (omc:ProductionScene, slates, camera metadata). PeriodO fills the narrative side; medium periods formalize the production side.

Period examples

• p-osc-narr-sc1: Route 66 origin era, Chicago, as-scripted 1926 (1926-1927; deny 1927-1929), ortho35
• p-osc-narr-sc2: Peak Route 66 Midwest era, Ariston Cafe, ~1935-1948 (1935-1938; deny 1946-1948), pan35
• sc3/sc4 deliberately array-valued: sc03 opens in sc02 medium, transitions to Kodachrome as color bleeds from rainbow; sc04 montage drifts Kodachrome -> VHS -> digital.

Research corpus per period

Verified facts with sources and status, anachronism deny-lists, genAI prompt conditioning, signage generations, hero locations, sound palettes.

Other content

• oscx:heroLocations: named real locations with NRHP IDs, bypass dates, archival provenance (LOC Highsmith call numbers, Villanova PDTP archive, Burton Frasher/Pomona, etc.)
• Story Objects & Motifs: me: identifiers (diner, Model T, rainbow, TV, capsule, Nutella, meteor…)
• NRHP properties DB: Soulsby, Ariston, U-Drop, Blue Swallow
• Open items: sc03 gas brand (verify via Newberry Curt Teich TX Geographic Index), “End of the Trail” trademark row on p-osc-narr-sc5

Notes

• This is the authoritative linkage between the film’s story eras and the medium looks in era-look-guide.
• See omc-ontology, era-locked-look, route-66, one-small-crawl.