Define extended tag properties (CSV or JSON)

You can add extended properties to a tag by defining it in the CSV or JSON metadata file.

Each AVEVA Insight solution is limited to a maximum of 48 extended properties, not counting the special extended properties, Location and Alias.

Extended property requirements

Extended property names are not case-sensitive. In addition, extended property names:

• Cannot be changed or deleted.

  Important! Be very careful not to mistype the extended property name. You will not be able to change or delete it after it is created.

• Must be unique. They cannot match one of the fixed property names.

• Must starts with a letter and include only alphanumeric characters and underscores.

• Can be up to 50 characters long.

An extended property must be set with one of these data types:

• Boolean

• Geometry

• Int32

• DateTimeOffset

• Guid

• Int64

• Double Int16

• String

• Geography

  Important! Once a data type is set for an extended property, it cannot be changed.

An extended property string value cannot be more than 512 characters.

Example: Extended properties in a CSV metadata file

Example: Extended properties in a JSON metadata file

{

  "metadata": [

    {

      "TagName": "Reactor3.Level",

      "Description": "Level in reactor on line 3",

      "DataType": "float",

      "EngUnit": "Liters",

      "InterpolationType": "linear",

      "MyExtendedProp": { "DataType":"Double", "Value":"20"}

    },

    {

      "TagName": "Reactor3.Level.SP",

      "Description": "Setpoint for level in reactor on line 3",

      "DataType": "float",

      "EngUnit": "Liters",

      "InterpolationType": "stairstep",

      "MyExtendedProp": { "DataType":"Double", "Value":"20"}

      "OtherNewProp": { "DataType":"String", "Value":"Test"}

    }

]

}

Once an extended property is created for a tag, it can be used with any other tag within the same AVEVA Insight solution.