[T] XmlEncoding

type XmlEncoding:
  | "TypeSpec.Xml.Encoding.xmlDateTime"
  | "TypeSpec.Xml.Encoding.xmlDate"
  | "TypeSpec.Xml.Encoding.xmlTime"
  | "TypeSpec.Xml.Encoding.xmlDuration"
  | "TypeSpec.Xml.Encoding.xmlBase64Binary";

Known Xml encodings