{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T09:53:23Z",
    "providers": [
      "Codex"
    ],
    "breadth": "recalled by Codex without web access - no source was read",
    "missingProviders": [],
    "pass": 2,
    "cost": {
      "grok": {
        "seconds": 15.4,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09508-09c3-7c42-93b2-6b4cbbb67800\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: Freiburg Bächle\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 1001",
        "usd": 0.0,
        "recall": true
      },
      "codex": {
        "seconds": 77.4,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a09508-09b8-7a52-a0a2-21f7ea0f96a8\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: Freiburg Bächle\nRegistry id: vr.tr.freiburg-b-chle\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: ("
      }
    },
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T12:00:00Z",
      "ingestedAt": "2026-10-06T08:42:17+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "failure_modes_and_hazards",
        "owners",
        "visual_identification"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:31+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q465753",
    "registryId": "vr.tr.freiburg-b-chle",
    "name": "Freiburg Bächle",
    "version": "0.1.0-research.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q465753/",
  "model": {
    "registry_id": "vr.tr.freiburg-b-chle",
    "name": "Freiburg Bächle",
    "purpose": "Enable an agent to recognise Freiburg's Bächle as a particular urban water-channel network, assess its local condition and determine appropriate observation, use or maintenance actions.",
    "definition": "The Freiburg Bächle are a historic network of small, artificial water channels, supplied from the Dreisam River, that run along streets in the old town of Freiburg im Breisgau, Germany.",
    "scope_statement": "This model owns the registered collective thing vr.tr.freiburg-b-chle: the Bächle network in Freiburg im Breisgau, including its constituent channels, hydraulic connections, street interfaces and documented historical continuity; individual reaches are parts of this thing rather than separate registry concepts.",
    "in_scope": [
      "Mapped Bächle reaches and their membership in the Freiburg network",
      "Channel fabric, gradients, junctions and covered connections",
      "Water-supply interfaces, flow conditions and interruptions",
      "Interactions with pedestrians, crossings and adjacent street uses",
      "Maintenance responsibilities and evidence for historical alterations"
    ],
    "out_of_scope": [
      "The Dreisam river and its catchment as complete hydrological systems",
      "The Gewerbekanal beyond interfaces supplying or receiving Bächle water",
      "Freiburg's drinking-water and sewer networks",
      "The Altstadt street network and buildings except at Bächle interfaces",
      "Bächle boats, races and folklore as independently modelled objects or cultural activities"
    ],
    "distinguishing_features": [
      "The name denotes the particular network in Freiburg im Breisgau's old town, not the general class of small streams or urban rills.",
      "A candidate reach must have documented membership in the Bächle network; a shallow channel elsewhere in Freiburg is insufficient evidence.",
      "The characteristic visible form is a shallow paved water channel embedded in the street environment. See [Freiburg's official visitor description](https://visit.freiburg.de/freiburger-baechle).",
      "The network receives Dreisam water; it should not be identified solely as rainfall drainage or a decorative recirculating fountain. See [the official Dreisam description](https://visit.freiburg.de/dreisam).",
      "A temporarily dry reach can remain part of the Bächle: absence of water distinguishes an operating state, not necessarily loss of identity."
    ],
    "characteristics": [
      {
        "name": "Reach membership",
        "kind": "relation",
        "unit_or_values": "Reach identifier, mapped geometry and evidence linking it to vr.tr.freiburg-b-chle",
        "why_it_matters": "Separates constituent Bächle reaches from neighbouring drains, canals and water features."
      },
      {
        "name": "Channel exposure",
        "kind": "category",
        "unit_or_values": "Open street channel | covered connection | uncertain",
        "why_it_matters": "Determines visibility, inspection access and how continuity can be established."
      },
      {
        "name": "Channel cross-section",
        "kind": "measurement",
        "unit_or_values": "Width and structural depth in millimetres at a specified location",
        "why_it_matters": "Supports assessment of capacity, damage and crossing conditions without confusing channel depth with water depth."
      },
      {
        "name": "Longitudinal gradient",
        "kind": "measurement",
        "unit_or_values": "Metres per metre over a surveyed reach",
        "why_it_matters": "Helps explain flow direction and distinguish local ponding from intended conveyance."
      },
      {
        "name": "Observed water condition",
        "kind": "state",
        "unit_or_values": "Flowing | ponded | dry | overflowing | unobserved, with timestamp",
        "why_it_matters": "Supports local decisions without treating a single observation as the state of the entire network."
      },
      {
        "name": "Flow observation",
        "kind": "measurement",
        "unit_or_values": "Water depth in millimetres and, where measured, discharge in litres per second, with method and timestamp",
        "why_it_matters": "Allows comparison between reaches and investigation of restricted or interrupted supply."
      },
      {
        "name": "Supply and discharge connections",
        "kind": "relation",
        "unit_or_values": "Verified upstream and downstream interfaces, direction and evidence",
        "why_it_matters": "Makes dependencies on adjacent water infrastructure explicit."
      },
      {
        "name": "Channel fabric condition",
        "kind": "state",
        "unit_or_values": "Intact | sedimented | obstructed | displaced paving | damaged joint | other documented defect",
        "why_it_matters": "Connects visible defects to specific inspection or repair needs."
      },
      {
        "name": "Street crossing interface",
        "kind": "category",
        "unit_or_values": "Open edge | flush crossing | bridge or cover | other surveyed arrangement",
        "why_it_matters": "Supports route assessment for pedestrians and people using wheels or mobility aids."
      },
      {
        "name": "Fabric history",
        "kind": "category",
        "unit_or_values": "Documented historic fabric | repaired | reconstructed | newly added | undetermined",
        "why_it_matters": "Prevents the age of the network from being assigned automatically to every visible stone."
      }
    ],
    "affordances": [
      "Identify and map a suspected Bächle reach against documented network membership.",
      "Trace a local interruption through verified supply connections and neighbouring reach observations.",
      "Assess a walking route using surveyed Bächle edges and crossings.",
      "Prepare a location-specific obstruction or damage report for the verified responsible operator.",
      "Evaluate a proposed repair or temporary crossing against hydraulic continuity and documented fabric constraints.",
      "Explain the network's historical and cultural significance while distinguishing sourced history from folklore."
    ],
    "agent_conduct": {
      "may": [
        "Describe the channels, their history and their place in the city from heritage and municipal sources.",
        "Report blockages, damage or pollution to the city authority."
      ],
      "must_not": [
        "Dam, divert or pollute the water in the channels.",
        "Encourage visitors to walk or cycle where people can twist ankles in the open channels.",
        "Drive or park machines into or across the channels.",
        "Dump waste or chemicals into them."
      ],
      "requires_human": [
        "Any construction or repair work that changes the channels."
      ]
    },
    "ethics": {
      "considerations": [
        "The channels are a shared heritage and amenity of the old town.",
        "Open channels in streets are a trip hazard for people with poor sight or mobility."
      ],
      "affected_parties": [
        "Residents and visitors",
        "People with visual or mobility impairments",
        "The city"
      ]
    },
    "owners": {
      "steward": "The city authority that maintains them as public heritage.",
      "master_systems": [
        "Municipal heritage and infrastructure records"
      ]
    },
    "visual_identification": [
      "Narrow, shallow stone-lined water channels running beside or along old town streets.",
      "Flowing water a few centimetres deep, often with small bridges or grates at crossings."
    ],
    "failure_modes_and_hazards": [
      "Pedestrians and cyclists stepping or riding into the channels and falling.",
      "Blockages that cause overflow in the street."
    ],
    "what_it_is_for": [
      "These shallow artificial channels run beside streets and through public spaces in Freiburg's historic centre.",
      "They are encountered as historic urban infrastructure and require observation of water flow, channel condition and pedestrian interaction."
    ],
    "standards_and_regulation": [
      "The Monument Protection Act of Baden-Wuerttemberg, issued by the state legislature, provides the legal framework for protecting the historic channel network."
    ]
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q465753: Freiburg Bächle",
      "url": "https://www.wikidata.org/wiki/Q465753",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Freiburg Bächle",
      "url": "https://en.wikipedia.org/wiki/Freiburg_B%C3%A4chle",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "network-identity",
        "name": "Network identity and extent",
        "description": "Establishes which channels belong to the Freiburg Bächle and how their parts form one registered thing.",
        "rationale": "The registry names a collective infrastructure feature whose identity cannot be reduced to one visible gutter.",
        "layers": [
          {
            "id": "registered-whole",
            "name": "Registered whole",
            "description": "Connects the registry entry to its geographically specific referent.",
            "findings": [
              {
                "id": "freiburg-network-referent",
                "name": "Freiburg network referent",
                "description": "Record the Bächle as the named Freiburg network, with reaches subordinate to the collective identity.",
                "questions": [
                  {
                    "text": "Which authoritative description and map establish the referent of Freiburg Bächle?",
                    "kind": "definition",
                    "id": "freiburg-network-referent-q01"
                  },
                  {
                    "text": "Does a proposed component belong to this network or merely resemble a Bächle?",
                    "kind": "boundary",
                    "id": "freiburg-network-referent-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "reach-connectivity",
            "name": "Reach connectivity",
            "description": "Represents visible reaches, junctions and connections that are concealed beneath the street.",
            "findings": [
              {
                "id": "verified-reach-topology",
                "name": "Verified reach topology",
                "description": "Store reach endpoints and supported connections without assuming that visual proximity proves hydraulic continuity.",
                "questions": [
                  {
                    "text": "Where does each mapped reach begin, end and join another Bächle reach?",
                    "kind": "measurement",
                    "id": "verified-reach-topology-q01"
                  },
                  {
                    "text": "What survey or operator record verifies connections beneath crossings or other covered sections?",
                    "kind": "provenance",
                    "id": "verified-reach-topology-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "water-supply-and-flow",
        "name": "Water supply and flow",
        "description": "Connects Bächle operating conditions to their water source and local conveyance.",
        "rationale": "A dry, slow or overflowing Bächle cannot be interpreted without distinguishing upstream supply from reach-level conditions.",
        "layers": [
          {
            "id": "upstream-dependencies",
            "name": "Upstream dependencies",
            "description": "Identifies the interfaces through which water enters the Bächle.",
            "findings": [
              {
                "id": "dreisam-supply-interface",
                "name": "Dreisam supply interface",
                "description": "Dreisam water supplies the Bächle; record the actual intervening connections and controls rather than treating the river and street channels as one asset. See [Freiburg's official Dreisam description](https://visit.freiburg.de/dreisam).",
                "questions": [
                  {
                    "text": "Which verified diversion and conveyance interfaces deliver Dreisam water to the Bächle?",
                    "kind": "boundary",
                    "id": "dreisam-supply-interface-q01"
                  },
                  {
                    "text": "Which operator records establish the controls and conditions governing that supply?",
                    "kind": "provenance",
                    "id": "dreisam-supply-interface-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "reach-flow-state",
            "name": "Reach flow state",
            "description": "Distinguishes measured local water behaviour from explanations for it.",
            "findings": [
              {
                "id": "flow-and-interruption",
                "name": "Flow and interruption",
                "description": "Record water depth, direction and continuity by reach and time; mark the cause of an interruption unknown until supported.",
                "questions": [
                  {
                    "text": "What depth, flow direction and discharge are observed at this reach and time?",
                    "kind": "measurement",
                    "id": "flow-and-interruption-q01"
                  },
                  {
                    "text": "What evidence distinguishes low upstream supply, planned isolation and a local obstruction?",
                    "kind": "provenance",
                    "id": "flow-and-interruption-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "channel-fabric-and-care",
        "name": "Channel fabric and care",
        "description": "Describes the physical channel and the interventions needed to preserve conveyance.",
        "rationale": "Bächle condition depends on small street-level details such as paving alignment, channel profile and accumulated debris.",
        "layers": [
          {
            "id": "channel-geometry",
            "name": "Channel geometry and fabric",
            "description": "Records the constructed form of individual reaches.",
            "findings": [
              {
                "id": "surveyed-channel-profile",
                "name": "Surveyed channel profile",
                "description": "Measure channel cross-sections and gradients and identify materials at the inspected reach rather than assigning a uniform profile to the network.",
                "questions": [
                  {
                    "text": "What are the width, structural depth and longitudinal gradient at this surveyed reach?",
                    "kind": "measurement",
                    "id": "surveyed-channel-profile-q01"
                  },
                  {
                    "text": "Which paving, lining and joint materials are actually present, and how were they identified?",
                    "kind": "provenance",
                    "id": "surveyed-channel-profile-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "inspection-and-intervention",
            "name": "Inspection and intervention",
            "description": "Relates visible defects to maintenance responsibility and permitted work.",
            "findings": [
              {
                "id": "reach-specific-maintenance",
                "name": "Reach-specific maintenance",
                "description": "Associate debris, sediment and damaged fabric with a precise location, observed effect and verified maintenance contact.",
                "questions": [
                  {
                    "text": "Does sediment, debris or displaced paving impede this reach or create a street-edge defect?",
                    "kind": "measurement",
                    "id": "reach-specific-maintenance-q01"
                  },
                  {
                    "text": "Who may clean, isolate or repair this reach, and what coordination is required before work?",
                    "kind": "action",
                    "id": "reach-specific-maintenance-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "street-and-public-use",
        "name": "Street interfaces and public use",
        "description": "Models the Bächle where moving water and open channels meet everyday use of the Altstadt.",
        "rationale": "The same channel is both infrastructure and a feature people cross, approach and interact with.",
        "layers": [
          {
            "id": "crossings-and-movement",
            "name": "Crossings and movement",
            "description": "Examines passage across and beside Bächle reaches.",
            "findings": [
              {
                "id": "passage-at-channel-edges",
                "name": "Passage at channel edges",
                "description": "Record actual crossing geometry and available clear passage, including implications for wheels and mobility aids.",
                "questions": [
                  {
                    "text": "Where are the usable crossings, and what are their clear widths, gaps and level changes?",
                    "kind": "measurement",
                    "id": "passage-at-channel-edges-q01"
                  },
                  {
                    "text": "Which route avoids an unsuitable open-channel crossing for the traveller's stated mobility needs?",
                    "kind": "action",
                    "id": "passage-at-channel-edges-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "water-contact-and-play",
            "name": "Water contact and play",
            "description": "Separates observed recreation from supported guidance about water contact.",
            "findings": [
              {
                "id": "recreation-with-evidence",
                "name": "Recreation with evidence",
                "description": "Foot contact and Bächle boats are described by the official visitor portal, but their popularity does not establish water quality or permission for every activity. See [Freiburger Bächle](https://visit.freiburg.de/freiburger-baechle).",
                "questions": [
                  {
                    "text": "What current notices or water-quality evidence apply to contact with water at this reach?",
                    "kind": "provenance",
                    "id": "recreation-with-evidence-q01"
                  },
                  {
                    "text": "Would a proposed boat activity, gathering or temporary installation obstruct flow or passage, and what permission applies?",
                    "kind": "action",
                    "id": "recreation-with-evidence-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "historical-continuity",
        "name": "Historical continuity and interpretation",
        "description": "Distinguishes the history of the network from the provenance of its present fabric and cultural associations.",
        "rationale": "A historic network can contain altered or reconstructed reaches, while familiar origin stories may require separate verification.",
        "layers": [
          {
            "id": "network-and-fabric-history",
            "name": "Network and fabric history",
            "description": "Tracks dated evidence for the network and changes to individual reaches.",
            "findings": [
              {
                "id": "dated-continuity-and-change",
                "name": "Dated continuity and change",
                "description": "Separate evidence for the network's existence from evidence dating a route, channel profile or surviving material.",
                "questions": [
                  {
                    "text": "Which dated records or archaeological findings establish the earliest supported Bächle network and its functions?",
                    "kind": "provenance",
                    "id": "dated-continuity-and-change-q01"
                  },
                  {
                    "text": "Which current reaches preserve an earlier alignment, and which have documented relocation or reconstruction?",
                    "kind": "provenance",
                    "id": "dated-continuity-and-change-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "heritage-and-cultural-meaning",
            "name": "Heritage and cultural meaning",
            "description": "Connects physical interventions and interpretation to documented significance.",
            "findings": [
              {
                "id": "supported-significance",
                "name": "Supported significance",
                "description": "Record formal protection separately from cultural associations; present the accidental-step marriage story as folklore, as the visitor portal does. See [Freiburger Bächle](https://visit.freiburg.de/freiburger-baechle).",
                "questions": [
                  {
                    "text": "What formal protection, if any, applies to this reach and constrains changes to its fabric or alignment?",
                    "kind": "boundary",
                    "id": "supported-significance-q01"
                  },
                  {
                    "text": "Which interpretive claims are documented history, and which are explicitly traditions or legends?",
                    "kind": "provenance",
                    "id": "supported-significance-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "evidence-and-external-alignment",
        "name": "Evidence and external alignment",
        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
        "layers": [
          {
            "id": "reported-evidence",
            "name": "Reported evidence",
            "description": "Findings from the breadth pass, kept separate from the structural claims.",
            "findings": [
              {
                "id": "evidence-confidence-notes",
                "name": "Check these first",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "This entry describes a particular infrastructure network, rather than a generic device or product type.",
                  "Check authoritative local records for the earliest documented date, total network length and present operating arrangements.",
                  "Historical uses are recalled general descriptions; their dates and relative importance require verification."
                ],
                "questions": [
                  {
                    "id": "evidence-confidence-notes-q01",
                    "text": "Which of these check these first hold for the sense of Freiburg Bächle this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-real-world-use",
                "name": "Real-world use",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Historically supplied water for firefighting.",
                  "Historically provided water for livestock and street cleaning.",
                  "Form a distinctive element of Freiburg's streetscape and cultural heritage.",
                  "Support informal recreation, including children's play with small toy boats."
                ],
                "questions": [
                  {
                    "id": "evidence-real-world-use-q01",
                    "text": "Which of these real-world use hold for the sense of Freiburg Bächle this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-failure-modes-and-hazards",
                "name": "Failure modes and hazards",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Open channels can cause pedestrians to trip or misstep.",
                  "Bicycle wheels can enter channels, causing loss of balance.",
                  "Sediment, litter and other obstructions can restrict water flow.",
                  "Low water availability or maintenance interruptions can leave channels dry."
                ],
                "questions": [
                  {
                    "id": "evidence-failure-modes-and-hazards-q01",
                    "text": "Which of these failure modes and hazards hold for the sense of Freiburg Bächle this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-regional-variation",
                "name": "Regional variation",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Bächle is a local Alemannic diminutive meaning small brooks; Freiburg Bächle denotes this particular city's channel network."
                ],
                "questions": [
                  {
                    "id": "evidence-regional-variation-q01",
                    "text": "Which of these regional variation hold for the sense of Freiburg Bächle this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-neighbours",
                "name": "Neighbouring kinds and how to tell them apart",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "name": "Dreisam",
                    "difference": "The Dreisam is the river supplying the system; the Bächle are constructed urban channels."
                  },
                  {
                    "name": "Stormwater gutter",
                    "difference": "A stormwater gutter primarily carries rainfall runoff; the Bächle carry deliberately diverted water independently of rainfall."
                  },
                  {
                    "name": "Natural brook",
                    "difference": "A natural brook follows a naturally formed watercourse; the Bächle form an engineered street-channel network."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-neighbours-q01",
                    "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of Freiburg Bächle this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "What authoritative current inventory defines the complete Bächle extent, including covered, disconnected and reconstructed reaches?",
    "What is the verified supply and discharge topology, and which controls and operating conditions determine interruptions?",
    "What evidence settles the earliest chronology and historical water uses, especially claims about drinking-water provision?",
    "Which bodies currently maintain the reaches, and what formal heritage protections and intervention permissions apply?",
    "What current water-contact guidance and surveyed crossing information support reach-specific public-use decisions?"
  ],
  "statistics": {
    "bundles": 6,
    "layers": 11,
    "findings": 15,
    "questions": 25
  }
}
