Version 2.0 revises and supersedes Version 1.0 (April 2026) in full. It introduces the Linkage Gap and adds formal RFC 2119 conformance language, an evidence-confidence model distinguishing verified from self-declared claims, an explicit gap_type field marking which evidence categories are addressable through this schema versus which reflect structural model judgments that evidence alone will not override, a new section positioning brand.context against other current machine-readable standards (OKF, ARD, LLMs.txt, EntityMap), and a single canonical domain and citation chain. Version 1.0 remains archived at its original DOI for historical reference only and should not be used as the current specification.