54 lines
2.3 KiB
Markdown
54 lines
2.3 KiB
Markdown
# Domain Glossary
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## Merchant
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A business represented in the source data. A merchant owns terminals, payment sessions, and merchant users. In the MVP, detailed data is visible only within that merchant's authenticated boundary.
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## Merchant User
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A person/account permitted to authenticate as one merchant. The hackathon seed creates an initial demo user for each merchant; a merchant and a merchant user are not the same concept.
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## Terminal
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A merchant-owned payment endpoint identified by the source terminal key.
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## Payment Session
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One payment journey identified by the source session key. A session belongs to one merchant and terminal and can contain one or more payment attempts.
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## Payment Attempt
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One try within a payment session, distinguished by its try sequence. This is the grain of a source CSV row and must not be confused with a unique payment session.
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## Opaque Payer Token
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The nullable `payer_card_key` source value. It is an unverified, merchant-scoped token used only for internal approximate repeat-payer analytics. It is not a card number or verified person identifier.
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## Import Run
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One traceable attempt to ingest a specific source archive/schema using a specific importer revision. It records outcome, counts, validation evidence, and provenance.
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## Calendar Date
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One civil date enriched with Gregorian and Jalali calendar attributes, Persian month/season, weekday, and reporting attributes.
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## Reporting Period
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An approved time window used for metrics: Tehran-local day, week, Jalali month, or Persian season.
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## Analytical Metric
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A deterministic numerical measure with a definition, source fields, filters, period, unit, missing-data behavior, and drill-down path.
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## Analytics Projection
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A rebuildable summary derived from normalized source-of-truth records to answer an approved metric efficiently. A projection is not independent business truth.
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## Analytics Revision
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A monotonically increasing merchant or cohort version changed when a related payment fact is inserted. Cached projections record the revision they represent; a revision mismatch makes them stale and triggers lazy recomputation on the next relevant dashboard request.
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## Peer Cohort
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An approved group of other merchants used for anonymized comparison. The active merchant is excluded, and a benchmark is suppressed unless at least 10 peers and 1,000 peer sessions contribute.
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