This message is used to embed XML content within FIX as raw data.

XmlDataLen (212) specifies the length of the content to follow, and XmlData (213) holds the data. Since these fields exist within the standard header, they can be used with any message type. This message is used when there isn't a more specific message type which is appropriate.

The XML content may be FIXML (FIX encoded as XML), or any other XML document.