BU-INDEX BU Source-Axis Index, Structural Index, and Ontology Map

BU-INDEX|BU Source-Axis Index, Structural Index, and Ontology Map establishes the directory hub, structural co-membership ledger, and DOI anchor map for the B_U file universe. It is not a derivative parent document, but a structural index that records how individual B_U files belong to the same source-axis file cluster. Its core function is to distinguish structural co-membership from strong dependency: all B_U files are members of the index universe, while direct References should be used only when a strong conceptual, methodological, or argumentative dependency exists. The index organizes BU01–BU101 into major structural clusters, including boundary axiomatics, physical interface and reality settlement, logic and mathematical systems, quantum and projection physics, consciousness and theory-audit extensions, and the Agentic AI series. Each file is preserved with its numbered entry, bilingual title, and DOI anchor, allowing the series to remain navigable as it expands. BU-INDEX therefore functions as a source-axis map rather than a compressed appendix: it provides readers with a stable entry structure, reduces citation noise, and keeps future additions aligned with the broader B_U ontology map.