ZXT/ZAX

ZXT/ZAX is a format for declaring extensions for ZZT worlds.

The file name extension is ZAX if it is a separate file from the world file, or is ZXT if it is concatenated the ZAX and ZZT file. (For example,  is a valid way to make a ZXT file from a ZAX and ZZT file.)

Identification
The first byte is 0x27, and the second byte may be:
 * 0xB2 for a ZZT board
 * 0xB5 for a Super ZZT board
 * 0xF2 for a ZZT world
 * 0xF5 for a Super ZZT world

Documentation

 * Official specification (also contains links to implementations)

Sample files
(Currently, this is the only known file. Later, it should probably be replaced by a link to a database of such files, instead of only this one.)
 * jar: http://zzo38computer.org/ZZT/xyzabcde.zip !/XYZABCDE.ZAX