https://learn.microsoft.com/en-us/dotnet/api/system.xml.xmldatadocument?view=net-10.0&redirectedfrom=MSDN
XmlDataDocument Class (System.Xml) | Microsoft Learn
Allows structured data to be stored, retrieved, and manipulated through a relational DataSet.
class systemxmlmicrosoftlearn
https://forums.mysql.com/read.php?38,9961
MySQL :: BLOB and XMLDataDocument
mysqlblob