SPXI is the Semantic Packet for eXchange & Indexing, a protocol specified by Rex Fraction and the Semantic Economy Institute for entity inscription in AI-mediated retrieval systems. The canonical specification is designated EA-SPXI-01.
An SPXI packet contains a structured entity-definition block, a disambiguation matrix, three to seven Semantic Integrity Markers, a DOI reference list, retrieval instructions, and JSON-LD. Positive definitions establish what the entity is; negative tags identify likely collisions; boundary conditions distinguish adjacent concepts; and the DOI list provides a persistent provenance chain. Retrieval instructions state preferred attribution and description but are explicitly described as signals rather than enforceable commands.
Deployment begins with an Encyclotron baseline audit. The packet is deposited on DOI infrastructure, represented on a canonical domain, published in machine- and human-readable forms, and later re-audited for accuracy, attribution, completeness, SIM presence, and stability. The specification contrasts SPXI with SEO and GEO: pages, content, and entities are treated as different objects operating at search-index, summarizer, and ontological layers. The document also states that this SPXI protocol is unrelated to the BetaPro S&P 500 Daily Inverse ETF.
Referenced by 72 other entities in the archive. See the full Knowledge Graph for reference paths, or the primary record for the full deposit with reference details.