A conservative view of which source layers MW entries cite. These are coarse comparison buckets, not dates.
Trust Block
- Evidence:
src/data/mw/mw-source-layer-summary.json,src/data/mw/mw-diachronic-profile.json, andsrc/data/mw-source-layers.json. - Limitations: layer assignment is coarse and reviewable; it is not exact chronology or corpus dating.
- Validation: generated by
npm run build-mw-depth; checked bynpm run validate-mw-depth,npm run validate-review-reports, andnpm run build. - Owner repo:
csl-atlas. - Next use: use the chart to choose a source-linked MW sample or a follow-on comparison.
Source-layer assignment is derived from a reviewable seed map and is deliberately incomplete. Unmapped sources fall to
unknown. Do not read these layers as exact chronology.
A record can cite sources from several layers, so these bars overlap.
Each record counted once, by its earliest cited layer (unknown ignored unless it is the only layer; none = no textual citation).
Generated by npm run build-mw-depth. Source-layer seed map: src/data/mw-source-layers.json. CC-BY-SA-4.0.