8.1.6.d data binding restrictions for upload element 8.1.6.d data binding restrictions for upload element The first two upload controls are bound to a node of type base64Binary and anyURI respectively. After activating either upload control and selecting a file the Filename and Media Type output controls must be filled in with the correct information about the file. The third upload control is bound to a node of type string, which is invalid for an upload element. Upload 3 must not work properly, generate an error, or not appear on this page. Upload 1 Valid Upload 2 Valid Upload 3 Invalid Filename : Media Type :