XML Describe Type Attribute XMLDescribeType (XDT) Purpose The SQL data type that is returned by SQLGetTypeInfo for the XML data type. See Using the XML Data Type for further information about the XML data type. Valid Values -4 | -10 Behavior If set to -4 (SQL_LONGVARBINARY), the driver uses the description SQL_LONGVARBINARY for columns that are defined as the XML data type. If set to -10 (SQL_WLONGVARCHAR), the driver uses the description SQL_WLONGVARCHAR for columns that are defined as the XML data type. Default -10 GUI Tab Advanced tab