A level is a measurement.
Origin is a record.
The three published index groups describe observed, provenance-reviewed lots. They are not currency balances or quoted sale prices.
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119.4Reference index points / 11 October 2034Human-era profiles
186.2Reference index points / 11 October 2034What enters the published observation?
- A text lot dated before 1 January 2023.
- A format group and an origin-review record.
- A recorded market observation for a reviewed lot.
- A permitted public aggregate, without private correspondence.
The index excludes private transfers and unreviewed origin claims. “Partner review” identifies a different review route, not a higher confidence score. Raw lot prices, sample counts and weighting methods are not published in this snapshot. No historical series is supplied.
The weighted illustration below is your own mix of the three levels. It is not an official combined index, a valuation, a forecast or a provider's calculation.
Old text can still be someone's text.
A date before the cutoff does not by itself establish human authorship, ownership or a right to train. Patina handles human-era profiles. Origin Office files origin scopes. Consent Window records particular permission terms.
Fresh prose at Longhand and rough versions at First Draft belong to a different market from this pre-2023 index.
There is no index for how much the letter meant to its first reader.