{
  "collection_name": "nexa_knowledge_text",
  "vector_config": {
    "size": 1024,
    "distance": "Cosine"
  },
  "payload_schema": {
    "source":      "keyword",
    "source_type": "keyword",
    "modality":    "keyword",
    "mime_type":   "keyword",
    "media_uri":   "keyword",
    "context":     "keyword",
    "tags":        "keyword",
    "graph_iri":   "keyword",
    "content_hash":"keyword",
    "created_at":  "datetime"
  },
  "_notes": {
    "vector_size_rationale": "1024 = bge-m3 output. If Q15 resolves to nomic-embed-text-v1.5 instead, rebuild this collection with size: 768.",
    "modality_field": "Always 'text' in this collection. Forward-compatibility for Phase 3.2 (see qdrant_schema_visual.json).",
    "graph_iri_field": "IRI of the corresponding nexa:Note in GraphDB. The same value is stored on the GraphDB node as nexa:vectorId pointing back here. This is the cross-pillar bridge."
  }
}