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yeiichi/column_contract_typA.csv

Created January 7, 2026 00:58
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Semantic contract for long-format datasets (Type A)
Raw
column_contract_typA.csv
Column Type Meaning Rules
entity string Thing being measured Stable label, not human prose
variable string What is measured Atomic, no units
value numeric Measured value Float/decimal only
unit string Measurement unit %, g/100g, mg/L, etc.
basis string Unit basis w/w, w/v, dry, as_is
method string Measurement method Optional
source string Source name File/site/report
source_id string Stable source key URL, DOI, hash
observed_at string/date When observed ISO-8601
quality_flag string Data quality ok, estimated, imputed
note string Free text Last resort only
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