dictionary.py now holds one definition per column for both tables — name, dtype,
unit, description — and build.py renders it four ways: data-dictionary.csv,
docs/data-dictionary.md, the card's Fields table, and the Hub's dtype frontmatter.
None of those is hand-written any more. The descriptions were previously prose in
the README and the dtypes a separate dict in build.py, so the two could disagree
about the same column and nothing would notice.
check() fails the build when a builder emits a column the dictionary does not
document, or documents one it does not emit, order included. Verified by removing
a column from the dictionary and confirming build.py exits 1 rather than writing a
dataset whose documentation is wrong.
datasheet/datasheet.typ is a datasheet for the dataset rather than a reference to
the sizes: scope in and out, composition of both tables, how each family's numbers
were derived and why ALCs have no internal dimensions, known limitations, capture
provenance, and the…
