Each FileAttachment in a Topic has an attribute string. At present only the hidden attribute is supported. If the attribute includes h then the attachment is considered to be hidden. It is not listed in the topic, but is displayed when attach page is displayed.
Related Topics:UserDocumentationCategory, DeveloperDocumentationCategory
“Life is not a journey to the grave with the intention of arriving safely in one pretty and well preserved piece, but to skid across the line broadside, thoroughly used up, worn out, leaking oil, shouting GERONIMO!” ~ Anonymous