TXmlDeserializer is a specialized TDeserializer class type for reading values from XML documents, using standard VCL XML classes, such as TXmlDocument. Usually, TXmlDeserializer reads XML documents, which has been previously generated by NG.Serialization.Xml.TXmlSerializer object.

TXmlSerializer is a specialized TSerializer class type for writing values in XML format, using standard VCL XML classes, such as TXmlDocument.

SNullValue global variable contains string value, which is used to represent Null or nil values in some serialization formats.

SObjectType global variable contains string value, which is used as a name of the object type-name attribute, created implicitly by the serialization engine when the type of an object value need to be stored in the output document.