{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T10:34:14Z",
    "providers": [
      "Codex"
    ],
    "breadth": "recalled by Codex without web access - no source was read",
    "missingProviders": [],
    "pass": 2,
    "cost": {
      "grok": {
        "seconds": 24.7,
        "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: 01a0952d-53db-7f70-882b-61fb2e94f3e3\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: iPod Touch (5th generation)\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Bat",
        "usd": 0.0,
        "recall": true
      },
      "codex": {
        "seconds": 84.2,
        "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: 01a0952d-53de-7bd0-a1d7-083545523a25\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: iPod Touch (5th generation)\nRegistry id: vr.tr.ipod-touch-5th-generation\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames fol"
      }
    },
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T12:00:00Z",
      "ingestedAt": "2026-10-06T08:55:11+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "failure_modes_and_hazards",
        "owners",
        "visual_identification"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q3788770",
    "registryId": "vr.tr.ipod-touch-5th-generation",
    "name": "iPod Touch (5th generation)",
    "version": "0.1.0-research.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q3788770/",
  "model": {
    "registry_id": "vr.tr.ipod-touch-5th-generation",
    "name": "iPod Touch (5th generation)",
    "purpose": "Enable an AI agent to identify an iPod Touch (5th generation), assess variant-dependent capabilities and observed condition, and choose justified operation, preservation or servicing actions.",
    "definition": "The iPod touch (5th generation) is an Apple handheld touchscreen media player and iOS computing device, introduced in 2012, with Wi-Fi connectivity but no cellular modem.",
    "scope_statement": "This model owns the generation-specific recognition criteria, capability distinctions and assessment questions for registry entry vr.tr.ipod-touch-5th-generation in PHY / PHY.OBJ; individual devices supply observations against it rather than becoming separate catalogue concepts.",
    "in_scope": [
      "Fifth-generation identification and hardware-variant distinctions",
      "Local media playback, touch interaction and variant-dependent capture capabilities",
      "Installed software, application compatibility and service dependencies",
      "Charging, battery endurance, physical condition and repair compatibility",
      "Device access, data preservation and readiness for reuse"
    ],
    "out_of_scope": [
      "The complete Apple iPod product line and other iPod touch generations",
      "Individual-device ownership, inventory and transaction records",
      "iOS as an independently versioned software platform",
      "Music, videos, photographs and applications as intellectual works",
      "Apple accounts, online services and wireless networks as separate systems",
      "Chargers, headphones and replacement parts as independently modelled products"
    ],
    "distinguishing_features": [
      "Cross-check the device's model marking against A1421 or A1509; distinguish fourth-generation A1367 and sixth-generation A1574. Treat conflicting enclosure and software evidence as unresolved identity. [Apple identification guide](https://support.apple.com/en-us/103823)",
      "Separate the 16 GB configuration without a rear-facing camera from camera-equipped configurations; storage capacity alone does not establish the camera arrangement. [Apple compatibility matrix](https://developer.apple.com/library/archive/documentation/DeviceInformation/Reference/iOSDeviceCompatibility/DeviceCompatibilityMatrix/DeviceCompatibilityMatrix.html)",
      "Use the combination of a 4-inch Multi-Touch display and Lightning connector as corroborating physical evidence, not a unique generation identifier. [Apple technical specifications](https://support.apple.com/en-ca/112021)",
      "Distinguish iPod touch from the similarly named fifth-generation iPod with video, which uses a Click Wheel. [Apple identification guide](https://support.apple.com/en-us/103823)"
    ],
    "characteristics": [
      {
        "name": "Generation identity evidence",
        "kind": "relation",
        "unit_or_values": "Model marking, software-reported identity and supporting manufacturer reference; agreement or conflict",
        "why_it_matters": "Prevents applying fifth-generation capabilities to a neighbouring generation or a device with a replaced enclosure."
      },
      {
        "name": "Hardware configuration",
        "kind": "category",
        "unit_or_values": "Camera-equipped configuration; 16 GB configuration without rear camera; unresolved",
        "why_it_matters": "Separates intentional feature absence from hardware failure."
      },
      {
        "name": "Storage capacity",
        "kind": "measurement",
        "unit_or_values": "GB nominal and GB available, recorded separately",
        "why_it_matters": "Determines room for media, applications and preservation work without confusing marketed capacity with usable space."
      },
      {
        "name": "Installed operating system",
        "kind": "category",
        "unit_or_values": "Observed iOS version and build; unknown if inaccessible",
        "why_it_matters": "Anchors application, host-tool and service compatibility decisions."
      },
      {
        "name": "Task compatibility",
        "kind": "relation",
        "unit_or_values": "Application or media format linked to version, dependencies, test date and result",
        "why_it_matters": "Distinguishes a historically advertised function from a task demonstrated to work now."
      },
      {
        "name": "Access and activation condition",
        "kind": "state",
        "unit_or_values": "Record passcode access, activation status and account association separately, each allowing unknown",
        "why_it_matters": "A booting device is not necessarily accessible or ready for a new user."
      },
      {
        "name": "Playback endurance",
        "kind": "measurement",
        "unit_or_values": "Minutes under a documented workload, brightness, volume and radio configuration",
        "why_it_matters": "Provides a usable estimate for an aged battery without assuming original advertised endurance."
      },
      {
        "name": "Charging and wired data condition",
        "kind": "state",
        "unit_or_values": "Charging and host recognition each tested, intermittent, failed or untested",
        "why_it_matters": "Separates Lightning power-path faults from data-path or host-compatibility problems."
      },
      {
        "name": "Interaction and media hardware condition",
        "kind": "state",
        "unit_or_values": "Per-component result for touch, display, buttons, audio and installed cameras: working, degraded, failed, absent by design or untested",
        "why_it_matters": "Supports task-specific fitness decisions instead of a single misleading working label."
      },
      {
        "name": "Battery and enclosure warning observations",
        "kind": "state",
        "unit_or_values": "Swelling, display separation, unusual heating, impact damage or liquid-exposure evidence; observed, not observed or unassessed",
        "why_it_matters": "Informs whether continued charging or handling needs a verified service procedure."
      }
    ],
    "affordances": [
      "Identify the generation and configuration using corroborating physical and software evidence.",
      "Evaluate a proposed offline playback, capture or application task against installed capabilities.",
      "Test charging, host recognition, controls and playback endurance under recorded conditions.",
      "Preserve accessible media and settings through a verified compatible transfer or backup route.",
      "Determine prerequisites and authorization for restoration, account removal or reassignment.",
      "Match servicing or retirement options to configuration, condition and data-preservation needs."
    ],
    "agent_conduct": {
      "may": [
        "Help the owner restore, back up or wipe their own fifth-generation device.",
        "Identify this generation from its narrow reversible connector, colours and wrist-loop button."
      ],
      "must_not": [
        "Recover or copy data from a device the user does not own without permission.",
        "Present it as safe for sensitive online use now that its software updates have ended.",
        "Sell a device that still holds a previous owner's account or data.",
        "Bypass an activation lock on a device not shown to belong to the user."
      ],
      "requires_human": [
        "Wiping or handing on a device that may hold someone else's data."
      ]
    },
    "ethics": {
      "considerations": [
        "Many of these devices were given to children and may still hold their data.",
        "Devices without security updates expose users to attacks."
      ],
      "affected_parties": [
        "Owners, including children",
        "Buyers of used devices"
      ]
    },
    "owners": {
      "steward": "The person who owns it.",
      "master_systems": []
    },
    "visual_identification": [
      "A thin touchscreen player in coloured aluminium with a home button and taller screen.",
      "A small pop-out button on the back for a wrist loop and a narrow reversible connector."
    ],
    "failure_modes_and_hazards": [
      "Ageing lithium batteries can swell.",
      "Unsupported software leaves it open to known security flaws."
    ],
    "what_it_is_for": [
      "This handheld touchscreen device is used for music, video, photography, games and compatible applications.",
      "Network services depend on wireless local networks because the device has no cellular modem.",
      "It is also encountered in collections and repair settings where software compatibility, battery condition and hardware variants affect usability."
    ],
    "standards_and_regulation": [
      "IEEE 802.11, issued by the Institute of Electrical and Electronics Engineers, governs the wireless local network technologies supported by this device.",
      "Title 47 CFR Part 15, issued by the United States Federal Communications Commission, regulates its radio emissions and operation in the United States."
    ]
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q3788770: iPod Touch (5th generation)",
      "url": "https://www.wikidata.org/wiki/Q3788770",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: IPod Touch (5th generation)",
      "url": "https://en.wikipedia.org/wiki/IPod_Touch_%285th_generation%29",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "generation-and-variant",
        "name": "Generation and variant",
        "description": "Resolve which fifth-generation configuration is represented and how confidently it has been identified.",
        "rationale": "Similar enclosures and differing camera configurations make the product name alone insufficient.",
        "layers": [
          {
            "id": "generation-recognition",
            "name": "Generation recognition",
            "description": "Corroborate generation identity without relying solely on appearance.",
            "findings": [
              {
                "id": "corroborated-model-identity",
                "name": "Corroborated model identity",
                "description": "Record the evidence supporting assignment to this registry entry, including disagreement after enclosure or board replacement.",
                "questions": [
                  {
                    "text": "Which model marking and software-reported identity support fifth-generation identification?",
                    "kind": "provenance",
                    "id": "corroborated-model-identity-q01"
                  },
                  {
                    "text": "What evidence excludes neighbouring iPod touch generations and the fifth-generation Click Wheel iPod?",
                    "kind": "boundary",
                    "id": "corroborated-model-identity-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "configuration-boundaries",
            "name": "Configuration boundaries",
            "description": "Describe supported configuration differences within this single registered thing.",
            "findings": [
              {
                "id": "camera-and-storage-configuration",
                "name": "Camera and storage configuration",
                "description": "Keep storage, rear-camera provision and loop-attachment provision distinct rather than inferring all three from a sales label.",
                "questions": [
                  {
                    "text": "Which storage, camera and loop-attachment configuration is supported by device observations and variant-specific documentation?",
                    "kind": "definition",
                    "id": "camera-and-storage-configuration-q01"
                  },
                  {
                    "text": "Is an absent rear camera or loop attachment original to this configuration, a modification or evidence of damage?",
                    "kind": "boundary",
                    "id": "camera-and-storage-configuration-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "media-and-touch-operation",
        "name": "Media and touch operation",
        "description": "Assess the device as an interactive media player and, where equipped, a capture device.",
        "rationale": "Fitness depends on the requested media task and available input and output paths.",
        "layers": [
          {
            "id": "playback-paths",
            "name": "Playback paths",
            "description": "Connect stored media and decoding compatibility to an observed output route.",
            "findings": [
              {
                "id": "demonstrated-media-playback",
                "name": "Demonstrated media playback",
                "description": "Assess a representative file through the intended audio or display output, separating decoding, access and output failures.",
                "questions": [
                  {
                    "text": "Which representative audio or video file plays successfully, through which application and output route?",
                    "kind": "measurement",
                    "id": "demonstrated-media-playback-q01"
                  },
                  {
                    "text": "Does failure arise from format compatibility, content authorization, missing data or the selected output hardware?",
                    "kind": "boundary",
                    "id": "demonstrated-media-playback-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "interaction-and-capture",
            "name": "Interaction and capture",
            "description": "Assess touch navigation, physical controls and the cameras actually fitted.",
            "findings": [
              {
                "id": "usable-controls-and-cameras",
                "name": "Usable controls and cameras",
                "description": "Record whether the touch surface, Home and other buttons, microphone and fitted cameras support the proposed task.",
                "questions": [
                  {
                    "text": "Which touch regions, buttons and fitted capture components pass a documented functional check?",
                    "kind": "measurement",
                    "id": "usable-controls-and-cameras-q01"
                  },
                  {
                    "text": "Can the proposed playback or capture task be completed with the observed faults and available accessibility settings?",
                    "kind": "action",
                    "id": "usable-controls-and-cameras-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "software-and-connections",
        "name": "Software and connections",
        "description": "Establish which tasks remain feasible with the installed software and available external systems.",
        "rationale": "Hardware capability alone cannot establish whether an older iPod can install an application, reach a service or synchronize with a host.",
        "layers": [
          {
            "id": "application-viability",
            "name": "Application viability",
            "description": "Evaluate applications and services against observed software versions and dependencies.",
            "findings": [
              {
                "id": "version-specific-task-support",
                "name": "Version-specific task support",
                "description": "Distinguish already installed functionality from applications that can still be obtained and services that remain reachable.",
                "questions": [
                  {
                    "text": "Which installed iOS build and application version successfully perform the requested task?",
                    "kind": "measurement",
                    "id": "version-specific-task-support-q01"
                  },
                  {
                    "text": "Would erasing or restoring the device remove software or credentials whose recovery has not been verified?",
                    "kind": "action",
                    "id": "version-specific-task-support-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "wireless-and-host-links",
            "name": "Wireless and host links",
            "description": "Test the network, accessory and computer connections needed for a particular workflow.",
            "findings": [
              {
                "id": "verified-connection-route",
                "name": "Verified connection route",
                "description": "Record successful Wi-Fi, Bluetooth or Lightning workflows with the actual peer device, host software and test date.",
                "questions": [
                  {
                    "text": "Which network, accessory or computer configuration establishes the required connection and completes the intended transfer or playback?",
                    "kind": "measurement",
                    "id": "verified-connection-route-q01"
                  },
                  {
                    "text": "Does a connection failure originate in the iPod hardware, cable, host software, network configuration or remote service?",
                    "kind": "boundary",
                    "id": "verified-connection-route-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "power-and-serviceability",
        "name": "Power and serviceability",
        "description": "Assess battery-powered operation, Lightning charging and configuration-appropriate servicing.",
        "rationale": "An aged portable player may operate while connected to power yet fail its intended portable task.",
        "layers": [
          {
            "id": "battery-and-charging",
            "name": "Battery and charging",
            "description": "Separate charging behavior, usable endurance and warning observations.",
            "findings": [
              {
                "id": "portable-operation-evidence",
                "name": "Portable operation evidence",
                "description": "Use an observed charging session and controlled playback test to assess portability, with inspection preceding testing.",
                "questions": [
                  {
                    "text": "What charging behavior and playback duration are observed with the cable, supply and workload recorded?",
                    "kind": "measurement",
                    "id": "portable-operation-evidence-q01"
                  },
                  {
                    "text": "Do swelling, display lifting or unusual heating require stopping the test and obtaining a verified service assessment?",
                    "kind": "action",
                    "id": "portable-operation-evidence-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "repair-and-operating-limits",
            "name": "Repair and operating limits",
            "description": "Ground service decisions in the exact configuration and applicable manufacturer documentation.",
            "findings": [
              {
                "id": "configuration-matched-service",
                "name": "Configuration-matched service",
                "description": "Require evidence for replacement-part compatibility, repair procedure and applicable electrical or environmental limits.",
                "questions": [
                  {
                    "text": "Which documented procedure and replacement part match this hardware configuration and diagnosed fault?",
                    "kind": "provenance",
                    "id": "configuration-matched-service-q01"
                  },
                  {
                    "text": "Which manufacturer limits and regional conformity records apply to this model, and what evidence supports continued use after repair?",
                    "kind": "action",
                    "id": "configuration-matched-service-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "access-preservation-and-reuse",
        "name": "Access, preservation and reuse",
        "description": "Determine whether device access and data dependencies permit preservation, restoration or reassignment.",
        "rationale": "A functioning iPod can still be unusable for reassignment, while restoration can remove difficult-to-recover content or software.",
        "layers": [
          {
            "id": "access-prerequisites",
            "name": "Access prerequisites",
            "description": "Separate physical possession, authorized access, passcode state and activation readiness.",
            "findings": [
              {
                "id": "authorized-operational-access",
                "name": "Authorized operational access",
                "description": "Record access prerequisites without treating an unlocked screen as proof of ownership or future activation success.",
                "questions": [
                  {
                    "text": "What authorization covers access or reassignment, and what passcode, account or activation barriers are observed?",
                    "kind": "provenance",
                    "id": "authorized-operational-access-q01"
                  },
                  {
                    "text": "Which legitimate account or activation prerequisites must be satisfied before erasure or handover?",
                    "kind": "action",
                    "id": "authorized-operational-access-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "preservation-before-transition",
            "name": "Preservation before transition",
            "description": "Assess recoverability before reset, repair or retirement changes the device state.",
            "findings": [
              {
                "id": "verified-preservation-route",
                "name": "Verified preservation route",
                "description": "Distinguish copied media, device backups and reproducible application installations; do not assume one preserves the others.",
                "questions": [
                  {
                    "text": "Which media, application data and settings require preservation, and which have been verified in an accessible copy or usable backup?",
                    "kind": "measurement",
                    "id": "verified-preservation-route-q01"
                  },
                  {
                    "text": "Should the authorized next action preserve the installed state, repair the device, restore it for reuse or retire it given verified recoverability?",
                    "kind": "action",
                    "id": "verified-preservation-route-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": [
                  "These details are recalled knowledge, not findings checked against sources for this response.",
                  "Verify the storage and camera variant before assigning specifications: the two 16 GB releases differ materially.",
                  "Check market-specific certification records and software compatibility separately; wireless-standard support does not establish every regional approval."
                ],
                "questions": [
                  {
                    "id": "evidence-confidence-notes-q01",
                    "text": "Which of these check these first hold for the sense of iPod Touch (5th generation) this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-kinds",
                "name": "Kinds and varieties",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "32 GB version with rear camera",
                  "64 GB version with rear camera",
                  "16 GB version introduced in 2013 without a rear camera",
                  "16 GB version introduced in 2014 with a rear camera"
                ],
                "questions": [
                  {
                    "id": "evidence-kinds-q01",
                    "text": "Which of these kinds and varieties hold for the sense of iPod Touch (5th generation) this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-identifiers",
                "name": "Identifiers and schemes",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "scheme": "Apple hardware model number",
                    "value_or_pattern": "A1421",
                    "note": "Fifth-generation versions equipped with a rear camera."
                  },
                  {
                    "scheme": "Apple hardware model number",
                    "value_or_pattern": "A1509",
                    "note": "The 2013 16 GB version without a rear camera."
                  },
                  {
                    "scheme": "Apple device identifier",
                    "value_or_pattern": "iPod5,1",
                    "note": "Software-facing hardware identifier for the fifth-generation iPod touch."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-identifiers-q01",
                    "text": "Which of these identifiers and schemes hold for the sense of iPod Touch (5th generation) this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-standards-and-regulation",
                "name": "Standards and regulation",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "IEEE 802.11a/b/g/n wireless networking standards, issued by IEEE.",
                  "Bluetooth Core Specification 4.0, issued by the Bluetooth Special Interest Group."
                ],
                "questions": [
                  {
                    "id": "evidence-standards-and-regulation-q01",
                    "text": "Which of these standards and regulation hold for the sense of iPod Touch (5th generation) 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": [
                  "Playing locally stored music, podcasts and video.",
                  "Running compatible iOS applications and games.",
                  "Browsing the web and using internet communication services over Wi-Fi.",
                  "Taking photographs and recording video, with rear-camera capability depending on the version.",
                  "Serving as a portable application terminal in education, retail and other institutional settings."
                ],
                "questions": [
                  {
                    "id": "evidence-real-world-use-q01",
                    "text": "Which of these real-world use hold for the sense of iPod Touch (5th generation) this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-measurements",
                "name": "Typical measurements",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "quantity": "Enclosure dimensions: height × width × depth",
                    "typical_range": "123.4 × 58.6 × 6.1",
                    "unit": "mm"
                  },
                  {
                    "quantity": "Mass, depending on version",
                    "typical_range": "86-88",
                    "unit": "g"
                  },
                  {
                    "quantity": "Display diagonal",
                    "typical_range": "4",
                    "unit": "in"
                  },
                  {
                    "quantity": "Display resolution",
                    "typical_range": "1136 × 640",
                    "unit": "pixels"
                  },
                  {
                    "quantity": "Advertised storage capacity",
                    "typical_range": "16, 32 or 64",
                    "unit": "GB"
                  },
                  {
                    "quantity": "Rear-camera still-image resolution, where fitted",
                    "typical_range": "5",
                    "unit": "megapixels"
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-measurements-q01",
                    "text": "Which of these typical measurements hold for the sense of iPod Touch (5th generation) 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": [
                  "Ageing of the internal rechargeable lithium-ion battery can cause reduced runtime or inability to hold a charge.",
                  "Battery damage or swelling can create overheating and fire hazards.",
                  "Drops can fracture the display glass or damage the touchscreen.",
                  "Liquid ingress can corrode internal components and cause electrical failure.",
                  "Wear or contamination of the Lightning connector can interrupt charging and data transfer."
                ],
                "questions": [
                  {
                    "id": "evidence-failure-modes-and-hazards-q01",
                    "text": "Which of these failure modes and hazards hold for the sense of iPod Touch (5th generation) 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": [
                  "Apple sales part numbers, packaging and regulatory markings vary by destination market."
                ],
                "questions": [
                  {
                    "id": "evidence-regional-variation-q01",
                    "text": "Which of these regional variation hold for the sense of iPod Touch (5th generation) 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": "iPod touch",
                    "difference": "The product family spans multiple generations; this entry describes only the fifth-generation hardware."
                  },
                  {
                    "name": "iPod touch (4th generation)",
                    "difference": "The preceding generation has a smaller 3.5-inch display and a 30-pin dock connector; the fifth generation has a 4-inch display and Lightning connector."
                  },
                  {
                    "name": "iPod touch (6th generation)",
                    "difference": "The succeeding generation uses an A8 processor and an 8-megapixel rear camera; the fifth generation uses an A5 processor and, where fitted, a 5-megapixel rear camera."
                  },
                  {
                    "name": "iPhone",
                    "difference": "An iPhone includes cellular communications hardware; this iPod touch relies on Wi-Fi for internet connectivity."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-neighbours-q01",
                    "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of iPod Touch (5th generation) this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "How should the conflicting fifth-generation model-number and introduction-date associations in Apple's current identification guide be reconciled with contemporaneous variant documentation?",
    "What are the exact final supported iOS build, currently available restore path and compatible host-tool versions for each included configuration?",
    "Which application-download, account-activation, synchronization and online-media workflows still work at assessment time?",
    "Which battery and display replacement parts are interchangeable between configurations, and which validated procedures and post-repair checks apply?",
    "Which regional certification records, issuing bodies and electrical or environmental limits apply to A1421 and A1509 respectively?"
  ],
  "statistics": {
    "bundles": 6,
    "layers": 11,
    "findings": 19,
    "questions": 29
  }
}
