PIERCE: Parsed Index of Editions, Rules, and Codified Evolution in Sport (Release 2026.08)

PIERCE is a research database of official sport rule books, decomposed to the level of the individual rule provision, with frozen public identifiers, provenance to canonical source documents, and full-text search. Live interface: https://adamcopeland.co/rulesThis deposit is the complete public export of release 2026.08, cut 14 August 2026:312 rulebook editions across 12 sports and 30 series (1892-2025), 123,734 rule nodes, all 312 editions parsed to rule level. Database content sha256 (first 16): 1c04ae3951962fb9 (full value in data/manifest.json).Contents- data/: catalog files (totals, sports, series, editions, manifest, unit types, concept schemes)- reader/: one JSON per edition; the node tree with headings, text per the exposure policy, and stable public identifiers of the form <edition-slug>/<path-label>- docs/: the identifier-registry design (stability guarantees) and the rule-text exposure policy- CITATION.cff: citation metadataText Exposure PolicyRule text is tiered per edition: full (public domain, pre-1931), truncated (first sentence per provision), or metadata. This deposit contains exactly what the public website serves; enforcement happens at export. See docs/EXPOSURE-PROPOSAL.md.Identifier StabilityEvery rule node carries a public identifier frozen at first publication. Identifiers are never renumbered or reused; retirements are tombstoned. See docs/IDENTIFIER-REGISTRY-BRIEF.md.CitingSee CITATION.cff. A data-descriptor paper is in preparation; until it publishes, cite the database directly and this deposit's DOI.