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Artwork Date Interval Width Tool

Measure a caller-supplied historical date envelope without dating or authenticating an artwork.

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Description

Return artwork year-range width under an endpoint policy.

Exhibition and catalog budgets distinguish object-days, area support, estimated missing text, date envelopes and monetary rates. Each total depends on its denominator and counting convention. A local estimate or premium term does not establish a historical date, an insurance entitlement or an actual exhibition condition.

Return artwork year-range width under an endpoint policy.

When to use this tool

Use Artwork Date Interval Width when reconciling the stated artwork coverage, duration, uncertainty envelope or cost term.

How to use the tool and how it works

  1. Enter earliestYear, latestYear, countEndpoints. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read widthYears. Use the output convention below.

Return artwork year-range width under an endpoint policy. Require whole earliestYear <= latestYear; widthYears = latest-earliest plus one when countEndpoints.1

Input fieldMeaning and unitsAccepted input
earliestYearEarliest YearRequired. Safe integer.
latestYearLatest YearRequired. Safe integer.
countEndpointsCount EndpointsRequired. Boolean.
Output fieldInterpretationReturned shape
widthYearsWidth YearsRequired. Safe integer.
json
{
  "input": {
    "earliestYear": 1850,
    "latestYear": 1860,
    "countEndpoints": false
  },
  "output": {
    "widthYears": 10
  }
}

Limitations and assumptions

  • Year numbering and historical calendar basis are supplied; no era conversion, dating evidence or confidence level is inferred.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
  • Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use verified exhibition, provenance and insurance records with the intended measurement and contractual conventions for substantive decisions.

References

  1. Calculation and input contract: art-history/artwork-date-interval-width — tool.io

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