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The HDF5 data format

HDF5 is the native data file format of Altair AI Cloud. Data files in this format use the extension rmhdf5table.

Supported data types​

Here's a list of the currently supported types in Altair AI Cloud's HDF5 format.

  • Real
  • Nominal
  • DateTime
  • Time
  • Text
  • TextList
  • TextSet
  • RealArray

Example JSON representation​

In some use cases, such as providing inputs and returning outputs in REST API deployments of workflows, the JSON representation must be used. Here's an example for such a representation.

{
  "table": {
    "height": 1,
    "width": 6,
    "columns": [
      {
        "name": "Age",
        "index": 0,
        "type": "Real",
        "data": [19]
      },
      {
        "name": "Passenger Class",
        "index": 1,
        "type": "Nominal",
        "data": ["Third"]
      },
      {
        "name": "Sex",
        "index": 2,
        "type": "Nominal",
        "data": ["Female"]
      },
      {
        "name": "No of Siblings or Spouses on Board",
        "index": 3,
        "type": "Real",
        "data": [2]
      },
      {
        "name": "No of Parents or Children on Board",
        "index": 4,
        "type": "Real",
        "data": [1]
      },
      {
        "name": "Passenger Fare",
        "index": 5,
        "type": "Real",
        "data": [75]
      }
    ]
  }
}