{
  "node": {
    "id": "term:hdf5",
    "type": "Term",
    "label": "HDF5 and Parquet",
    "properties": {
      "id": "hdf5",
      "name": "HDF5 and Parquet",
      "abbr": ".h5, .parquet",
      "section": "topic-data",
      "definition": "General-purpose binary formats for large scientific and tabular data — hierarchical HDF5 and columnar Parquet — used to store battery test and fleet data at scale, where CSV becomes too slow and too large.",
      "related": [
        "mdf4",
        "battery-data-format",
        "fleet-telematics"
      ],
      "url": "https://lemonergy.com/learn/glossary/hdf5/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:4237",
      "source": "term:hdf5",
      "target": "topic:topic-data",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:4238",
      "source": "term:hdf5",
      "target": "term:mdf4",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4239",
      "source": "term:hdf5",
      "target": "term:battery-data-format",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4240",
      "source": "term:hdf5",
      "target": "term:fleet-telematics",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-data",
      "type": "Topic",
      "label": "Data, communication and electronics",
      "properties": {
        "id": "topic-data",
        "name": "Data, communication and electronics",
        "lede": "The control units, chips, protocols and file formats through which a battery is measured, controlled and logged.",
        "context": "Separate quantities from encoding and transport.",
        "example": "2500 in a log might mean 25.00 °C, 2.5 V or raw counts. Units and scale must accompany the value.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
      }
    },
    {
      "id": "term:mdf4",
      "type": "Term",
      "label": "MDF4",
      "properties": {
        "id": "mdf4",
        "name": "MDF4",
        "abbr": ".mf4",
        "aka": [
          "ASAM MDF",
          "Measurement Data Format",
          "MDF"
        ],
        "section": "topic-data",
        "definition": "The ASAM standard binary format for measurement data, version 4 with the .mf4 extension: it stores decoded signals and raw bus frames side by side with their units, conversions and timestamps, compressed and indexed so large logs open quickly. It is the common exchange format for vehicle and battery test data.",
        "related": [
          "blf",
          "dbc",
          "a2l",
          "xcp",
          "data-logger",
          "hdf5"
        ],
        "url": "https://lemonergy.com/learn/glossary/mdf4/",
        "mentions": []
      }
    },
    {
      "id": "term:battery-data-format",
      "type": "Term",
      "label": "Battery Data Format",
      "properties": {
        "id": "battery-data-format",
        "name": "Battery Data Format",
        "abbr": "BDF",
        "aka": [
          "Battery Data Alliance"
        ],
        "section": "topic-data",
        "definition": "An open, tool-independent format for cell-test time series — time, voltage, current, temperature, cycle and step with agreed names and units — promoted by the Battery Data Alliance so data from different cyclers can be shared and compared without conversion scripts.",
        "related": [
          "cycler-file-formats",
          "hdf5",
          "cycler",
          "reference-performance-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/battery-data-format/",
        "mentions": []
      }
    },
    {
      "id": "term:fleet-telematics",
      "type": "Term",
      "label": "Fleet telematics",
      "properties": {
        "id": "fleet-telematics",
        "name": "Fleet telematics",
        "section": "topic-applications",
        "definition": "The systems that collect battery state, consumption and fault data from each vehicle in a fleet and bring them to the depot and the operator. For an electric bus fleet they are what turns BMS data into charging plans and warranty cases.",
        "related": [
          "fms-interface",
          "vdv-301",
          "depot-charging",
          "state-of-health",
          "electric-bus",
          "data-logger"
        ],
        "url": "https://lemonergy.com/learn/glossary/fleet-telematics/",
        "mentions": [
          "bms"
        ]
      }
    }
  ]
}