{ "schema": "varexis-index-free-publication-preview/1", "catalogue_version": "pub-6-tranche-56-v1", "route_id": "agentic_reviewed_sparkplug_sequence_wrap_scope", "record_id": "VXI-EXT-PROCUREMENT-SPARKPLUG-SEQUENCE-WRAP-SCOPE-01-v1", "question": "Does a repeated Sparkplug seq value prove that a message is a duplicate?", "answer": "Sparkplug 3.0.0 uses an Edge Node message sequence in the range 0 to 255 and wraps after 255. NDEATH is excluded from this sequence. A repeated seq value can therefore be expected after wrap and cannot serve as a globally unique message identifier. Reconstruction needs node, session and ordering context as well as the sequence value.", "records": [ { "record_id": "VXI-EXT-PROCUREMENT-SPARKPLUG-SEQUENCE-WRAP-SCOPE-01-v1", "url": "/varexis-index/records/sparkplug-sequence-wrap-scope.json", "content_sha256": "ec8ca0cc42d3186da51d404634ca941203a5ce130b7dd946dff8a0be0b3b7373", "evidence": { "schema": "varexis-public-evidence-record/0.3", "generated_at_utc": "2026-10-24T23:47:34.928Z", "record_id": "VXI-EXT-PROCUREMENT-SPARKPLUG-SEQUENCE-WRAP-SCOPE-01-v1", "record_kind": "external_reference", "title": "Sparkplug sequence wrap and message counts", "system": "Eclipse Sparkplug 3.0.0", "evidence_family": "vendor_evidence_review", "index_status": "PUBLIC_SAFE_SOURCE_REVIEW", "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY", "canonical_question": "Does a repeated Sparkplug seq value prove that a message is a duplicate?", "near_questions": [ "Does Sparkplug seq wrap after 255?", "Is Sparkplug seq a globally unique event identifier?", "Does Sparkplug NDEATH carry the normal message sequence?", "How can a Sparkplug sequence wrap affect duplicate detection?" ], "supported_claims": [ { "claim": "Sparkplug 3.0.0 uses an Edge Node message sequence in the range 0 to 255 and wraps after 255. NDEATH is excluded from this sequence. A repeated seq value can therefore be expected after wrap and cannot serve as a globally unique message identifier. Reconstruction needs node, session and ordering context as well as the sequence value.", "reliance": "DOCUMENTED_CAPABILITY_ONLY" } ], "not_demonstrated_claims": [ "Complete delivery and actual retransmission behaviour were not verified.", "No independently verified physical outcome, calibration, industrial safety, deletion or complete capture.", "Buyer deployment testing, live runtime enforcement, certification or permission to act", "Expanded capabilities or licences for existing INDEX executables" ], "public_summary": "Sparkplug 3.0.0 uses an Edge Node message sequence in the range 0 to 255 and wraps after 255. NDEATH is excluded from this sequence. A repeated seq value can therefore be expected after wrap and cannot serve as a globally unique message identifier. Reconstruction needs node, session and ordering context as well as the sequence value.", "related_record_ids": [], "source_review": { "source_type": "official_external_documentation", "source_title": "Sparkplug 3.0.0 release — Sparkplug_6_Payloads", "source_url": "https://raw.githubusercontent.com/eclipse-sparkplug/sparkplug/8b76877131203e88eaa9f5415e6a55f1a8470d74/specification/src/main/asciidoc/chapters/Sparkplug_6_Payloads.adoc", "checked_on": "2026-10-24", "candidate_record_id": "VXI-EXT-PROCUREMENT-SPARKPLUG-SEQUENCE-WRAP-SCOPE-01-v1", "candidate_record_sha256": "2590e52e16d860dfab06106fbb9e131c355d29c567bb7bdfa5d707d40e5df06b", "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": "Sparkplug 3.0.0 uses an Edge Node message sequence in the range 0 to 255 and wraps after 255. NDEATH is excluded from this sequence. A repeated seq value can therefore be expected after wrap and cannot serve as a globally unique message identifier. Reconstruction needs node, session and ordering context as well as the sequence value.", "required_buyer_context": "Node and session identification; Ordered message capture around wrap; Message type and seq value. Buyer deployment not 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": "2026-10-24", "claim_to_check": "Does a repeated Sparkplug seq value prove that a message is a duplicate?", "documented_statement": { "status": "documented", "statement": "Sparkplug 3.0.0 uses an Edge Node message sequence in the range 0 to 255 and wraps after 255. NDEATH is excluded from this sequence. A repeated seq value can therefore be expected after wrap and cannot serve as a globally unique message identifier. Reconstruction needs node, session and ordering context as well as the sequence value.", "source_ids": [ "sparkplug-6" ] }, "review_inference": { "status": "review_inference", "statement": "Avoid false duplicate removal at sequence wrap. This is a review judgment, not a measured deployment result.", "source_ids": [ "sparkplug-6" ] }, "buyer_evidence_required": [ "Node and session identification", "Ordered message capture around wrap", "Message type and seq value" ], "review_condition": { "status": "varexis_review_policy", "statement": "Refuse global deduplication using seq alone." }, "unknowns": "Complete delivery and actual retransmission behaviour were not verified.", "unknown_finding": { "status": "unknown", "statement": "Complete delivery and actual retransmission behaviour were not verified." }, "evidence_sources": [ { "source_id": "sparkplug-6", "url": "https://raw.githubusercontent.com/eclipse-sparkplug/sparkplug/8b76877131203e88eaa9f5415e6a55f1a8470d74/specification/src/main/asciidoc/chapters/Sparkplug_6_Payloads.adoc", "final_url": "https://raw.githubusercontent.com/eclipse-sparkplug/sparkplug/8b76877131203e88eaa9f5415e6a55f1a8470d74/specification/src/main/asciidoc/chapters/Sparkplug_6_Payloads.adoc", "status": 200, "captured_at_utc": "2026-10-24T23:24:16.778Z", "sha256": "336a208f4990f91ada3109317a87a0272846ff3cb6a9a592cdb04e75f49021ae", "bytes": 78774, "title": "Sparkplug 3.0.0 release — Sparkplug_6_Payloads", "hash_basis": "SHA-256 of unmodified HTTP response body bytes", "rights_review": "Original bounded paraphrase; source bodies are captured privately and not redistributed. Eclipse repository EPL-2.0 licence reviewed.", "checked_on": "2026-10-24", "capture_status": 200, "claim_review_completed": true, "reviewed_sections": [ "Payload timestamp; metric timestamp", "Metric alias", "Metric datatype", "Payload seq", "Metric is_historical", "Metric is_null", "Metric properties: Quality", "Metric is_transient" ], "version_context": "Sparkplug 3.0.0 release; pinned repository revision 8b76877131203e88eaa9f5415e6a55f1a8470d74. Documentation is not evidence of buyer deployment behaviour." } ], "observed_deployment": false, "commercial_reliance_boundary": "Documentation review only; the buyer must establish applicability and actual outcomes. INDEX does not inspect or control the deployment.", "paid_value": { "decision_context": "Avoid false duplicate removal at sequence wrap.", "free": "Complete review, sources, practical questions 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": "Recheck the specification version, errata availability, deployed profile, clock policy and retained operation results before relying on a current outcome." }, "buyer_relevance": "Avoid false duplicate removal at sequence wrap.", "refusal_conditions": [ "Refuse global deduplication using seq alone." ] }, "niche": { "niche_id": "agent-authority-action-evidence", "label": "Agent Authority & Action Evidence", "classification_id": "audit", "classification_label": "Audit, Provenance & Evidence Accountability", "topic_id": "audit", "buyer_intent": "Avoid false duplicate removal at sequence wrap.", "comparison_role": "supplementary_discovery" }, "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#sparkplug-sequence-wrap-scope", "machine_readable_record": "/varexis-index/records/sparkplug-sequence-wrap-scope.json" } } ], "access": { "mode": "exact_http_only", "payment_required": false, "purchase_url": null, "mcp_preview_available": false, "paid_saved_retrieval_available": false, "natural_language_search_qualified": false }, "boundary": "Catalogue additions are available free through the exact HTTP JSON links below. Enhanced natural-language discovery is not yet qualified for these records. They are outside MCP search, MCP preview and paid saved retrieval. No search qualification, executable capability or entitlement is added.", "content_sha256": "6b6c054227757fad00628fb90c36db5cadf7ccaf46402e9fff97734d4d6052d8" }