nicweyand
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26 lines
1.2 KiB
Markdown
26 lines
1.2 KiB
Markdown
# ADR 0006: Source lineage and independence
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Status: Implemented in 0.5.
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Corroboration must describe the direct provider, upstream dataset, transformation,
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and snapshot. Two providers that copied the same upstream assertion do not count
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as independent evidence merely because their URLs differ. Unknown lineage stays
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unknown.
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Version 0.5 adds explicit source-manifest lineage and exposes it in evidence and
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evaluation without rewriting legacy history. It preserves provider-native
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provenance and never combines popularity or same-domain evidence into ownership
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confidence. Current admission quorum is made only from authenticated reviewers,
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groups and physical keys, so copied source assertions cannot increase authority.
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## Rejected alternatives
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Counting provider names as independent evidence rewards copied datasets. Guessing
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lineage from matching text creates another unsupported inference. Dropping a
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source because lineage is unknown destroys useful conflicting evidence.
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## Compatibility
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The v0.4 policy does not award quorum from source count, so absent lineage cannot
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inflate reviewer authority. Future lineage fields must be additive provenance;
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old assertions remain byte-identifiable and are never rewritten as independent.
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