{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-16T12:55:40.483Z",
  "record_id": "VXI-EXT-PROCUREMENT-COSMOS-TTL-01-v1",
  "record_kind": "external_reference",
  "title": "Cosmos DB TTL: Hidden from queries before deletion",
  "system": "Azure Cosmos DB",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does an expired Cosmos DB item disappear physically as soon as queries stop returning it?",
  "near_questions": [
    "Does Cosmos TTL start at creation or last modification?",
    "Can an item override the container value?",
    "Does item TTL work when container TTL is disabled?",
    "Can expired data remain pending background deletion?",
    "Why might deletion wait for request units?",
    "Are serverless deletion charges different?",
    "Does a query returning no rows prove physical removal?",
    "Can an update extend the expiry point?",
    "Which items are exempted from expiry?",
    "Are mirrored or backup copies separately considered?",
    "What evidence supports the deletion claim?",
    "Can I save the query-versus-deletion distinction?"
  ],
  "supported_claims": [
    {
      "claim": "Expired items stop appearing in query responses immediately, while background deletion can wait for resources. TTL is measured from the last modification, and item-level values depend on container TTL being enabled. Query absence is therefore not proof of completed physical deletion or deletion from other stores.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Verified buyer configuration or effective access rights",
    "Independent execution, completeness or security testing",
    "Vendor certification, legal compliance or guaranteed suitability"
  ],
  "public_summary": "Expired items stop appearing in query responses immediately, while background deletion can wait for resources. TTL is measured from the last modification, and item-level values depend on container TTL being enabled. Query absence is therefore not proof of completed physical deletion or deletion from other stores.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "Cosmos DB item expiry",
    "source_url": "https://learn.microsoft.com/en-us/azure/cosmos-db/time-to-live",
    "checked_on": "2026-10-16",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-COSMOS-TTL-01-v1",
    "candidate_record_sha256": "470793d251420c1ad64502ab4270ae20b8b718492799eb1d6df4c5b2ae8df1e5",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "Expired items stop appearing in query responses immediately, while background deletion can wait for resources. TTL is measured from the last modification, and item-level values depend on container TTL being enabled. Query absence is therefore not proof of completed physical deletion or deletion from other stores.",
    "required_buyer_context": "Container TTL, item override, last modification, throughput mode and retained copies. Effective configuration and dated operational evidence have not been inspected.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-16",
    "claim_to_check": "No query result proves immediate complete data erasure.",
    "documented_statement": {
      "status": "documented",
      "statement": "Expired items stop appearing in query responses immediately, while background deletion can wait for resources. TTL is measured from the last modification, and item-level values depend on container TTL being enabled. Query absence is therefore not proof of completed physical deletion or deletion from other stores.",
      "source_ids": [
        "cosmos"
      ]
    },
    "buyer_evidence_required": [
      "Container and item TTL configuration.",
      "Last-modified time and deletion evidence.",
      "Throughput mode and separately retained data."
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Keep query invisibility separate from completed deletion and wider retention claims."
    },
    "unknowns": "The buyer configuration, contract, effective entitlement and operational evidence have not been inspected. Missing evidence does not establish absence or failure of the feature.",
    "evidence_sources": [
      {
        "source_id": "cosmos",
        "url": "https://learn.microsoft.com/en-us/azure/cosmos-db/time-to-live",
        "final_url": "https://learn.microsoft.com/en-us/azure/cosmos-db/time-to-live",
        "title": "Cosmos DB item expiry",
        "checked_on": "2026-10-16",
        "sha256": "a5e203df91013e52512e4193645fd9aa18c917b61db39120d55fe04e68a45962",
        "bytes": 51785
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Procurement evidence support only; no supplier clearance, legal conclusion, configuration audit or verification of the buyer's claim is supplied.",
    "paid_value": {
      "decision_context": "Retain the exact lifecycle boundary behind a data-retention procurement decision.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Container TTL, item override, last modification, throughput mode and retained copies."
    }
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#cosmos-ttl-query-hiding-deletion-delay",
  "machine_readable_record": "/varexis-index/records/cosmos-ttl-query-hiding-deletion-delay.json"
}