ReadonlyaggregationReadonlycolumnOptionaldataData formatting options for the field.
ReadonlydataReadonlydataReadonlydescriptionReadonlyidReadonlyisReadonlyisReadonlyisTrue if this field is generated by Tableau, false otherwise. Tableau generates a number of fields for a data source, such as Number of Records, or Measure Values. This property can be used to distinguish between those fields and fields that come from the underlying data connection, or were created by a user.
ReadonlyisReadonlyisReadonlyisReadonlynameReadonlyroleOptionalsemanticThe semantic role of the field. Can be either a geographic role (e.g. latitude, longitude, city, country, etc...) or an image role
A field contains information about what data source it belongs to, its role, and the ability to fetch the domain values.