When XOP encoding is enabled as described in AttachmentMarshaller.isXOPPackage(), this annotation disables datatypes such as Image or Source or byte[] that are bound to base64-encoded binary from being considered for XOP encoding. If a JAXB property is annotated with this annotation or if the JAXB property's base type is annotated with this annotation, neither AttachmentMarshaller.addMtomAttachment(DataHandler, String, String) nor AttachmentMarshaller.addMtomAttachment(byte[], int, int, String, String, String) is ever called for the property. The binary data will always be inlined.