This build time property defines the field mapping for creating the search area code (Sac).
Example
"errata" : {
"SacFromFile" : [ "PostalCode", "PostalCode" ]
}SacFromFile in the JSON must be numeric. Postal codes are numeric for most countries and can be used to define the SacFromFile. For those countries where postal codes are not numeric, the Custom Dataset Builder requires a field that can provide a logical grouping.