what is that: Content-Type: application/x-bxml?

[trapt]

I've recently discovered one public undocumented web service that I would like to use.The Problem is in Content Type that is used by the web serivice.Content-Type: application/x-bxmlWhat is that?At first sight it looks like Binary Xml,I am able to recognize xml tags and attribute names, but I cannot find any description for the format.The header of the data starts with "BXMLe".any help would be appreciated!Thanks in advance.