|Programs supporting this format|
Island package files are containers for island construction files. They exist only in LBA 2. Their purpose is identical to zip, rar or tar.gz archives: to keep large amounts of files in a more efficient way (easier to copy and smaller by using compression).
All resource package formats (HQR, VOX, ILE and OBL) share the same format, they differ only in purpose.
For details about resource package structure see High quality resources.