Update README.md

Add Ontology section to main README — declare dslo.owl as DSLO v0.6 semantic‑web surface

This commit updates the main README with a dedicated Ontology section describing:

the canonical ontology IRI and namespace

the role of ontology/dslo.owl as the authoritative semantic‑web artifact

the merge of v0.5 substrate terms and v0.6 public‑layer additions

the ontology’s purpose within DSLO’s public‑layer posture

the multi‑format propagation plan (TTL, JSON‑LD, RDF, SKOS, OBO, UMLS)

the boundary statement ensuring no substrate‑native leakage

This addition aligns the README with the updated manifest and establishes the ontology as a first‑class DSLO v0.6 surface for AI crawlers, BioPortal, and semantic‑web indexing.

README.md

@@ -61,6 +61,67 @@ Dynamic State Update Protocol (DSUP)
 
 Signal Ecology
 
+---
+DSLO Ontology 
+
+The DSLO Ontology defines the machine‑readable semantic surface for all public‑layer DSLO terms.
+It provides a stable, crawler‑accessible representation of the unified glossary published at:
+
+https://www.tnopsi.com/dslo-glossary
+
+The ontology merges the full v0.5 substrate glossary with all v0.6 public‑layer additions, forming a unified semantic vocabulary for semantic‑web tools, AI systems, and scientific indexing.
+
+Canonical Namespace
+
+https://www.tnopsi.com/dslo-glossary#
+
+Canonical Ontology Artifact
+
+ontology/dslo.owl
+
+This RDF/XML file is the authoritative source for all downstream ontology formats.
+
+---
+Purpose
+
+The DSLO Ontology provides:
+
+deterministic ingestion by AI crawlers
+
+compatibility with BioPortal and semantic‑web tooling
+
+cross‑ontology alignment and mapping
+
+machine‑readable access to DSLO’s public‑layer vocabulary
+
+a stable semantic surface for DSLO v0.6 and future releases
+
+It is the machine‑readable counterpart to the human‑readable glossary.
+
+---
+Formats
+The ontology will be exported into multiple formats for broad interoperability:
+
+dslo.owl — RDF/XML (canonical)
+
+dslo.ttl — Turtle
+
+dslo.jsonld — JSON‑LD
+
+dslo.rdf — alternate RDF/XML
+
+dslo.skos — SKOS vocabulary
+
+dslo.obo — OBO format
+
+dslo.umls — UMLS mapping stub
+
+All formats derive from the canonical ontology IRI and preserve DSLO’s public‑layer invariant posture.
+
+---
+Boundary Statement
+The ontology exposes only the stabilized public‑layer vocabulary.
+Substrate‑native geometry, legality masks, and runtime primitives remain within the protected DSLO manifold and are not included in this surface.
 
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