"obsolete" is meaningless. "proprietary" too, because it is well-documneted. The subset that is only necessary for vector images, obviously. Nothing beyond a

"obsolete" is meaningless. "proprietary" too, because it is well-documneted. The subset that is only necessary for vector images, obviously. Nothing beyond a single frame is needed. Since it's a TLV format, renderers can ignore anything they don't need, which includes the interactive and scripting features.