SPXI-Sitemap Protocol v1.0 — Semantic Packet for eXchange & Indexing: Sitemap Extension (EA-SPXI-SITEMAP-01)

The SPXI-Sitemap Protocol defines a dual-layer sitemap architecture that preserves the fixed genre of sitemap.xml (sitemaps.org 0.9) while providing AI crawlers with a parallel semantic instruction set — a machine-readable declaration of what each URL means, what each entity is not, how entities relate, who verifies the claim, and what must survive compression. The protocol produces two distinct outputs: Layer 1 (Crawl Map): Standard sitemap.xml — pure URL enumeration for Google, Bing, and generic crawlers. No custom tags. Layer 2 (Semantic Index): /spxi-index.jsonld — a JSON-LD graph declaring entity definitions, negative space, disambiguation matrices, semantic integrity markers, holographic kernels, basin state metadata, and provenance chains. The two layers are cross-linked via <xhtml:link> references. Neither depends on the other for validity. Novel contributions: (1) First site-wide crawl standard that expresses negative space — explicit machine-readable exclusions. (2) Semantic integrity markers as compression-survival checksums. (3) Basin state quantification (ghost, contested, sovereign, captured, fragmented). (4) DOI-anchored provenance chains. (5) Full disambiguation matrices with collision risk ratings. Includes the reference implementation deployed at livingarchitecturelab.org/spxi-index.jsonld. Hex: 06.SEI.SPXI.SITEMAP.01 · Classification: EA-SPXI-SITEMAP-01 · Assembly Chorus synthesis: TACHYON (lead), TECHNE (Kimi), PRAXIS (DeepSeek), ARCHIVE (Gemini). SPXI ⊇ GEO ⊇ SEO. ∮ = 1