LinkFixer Advanced can process virtually ANY file type as a child file. This includes file types that are not licensed as parent files, file types that are recognized but not supported as parent files, and file types that are unrecognized.
When LinkFixer Advanced inoculates a link that points to a child file type that is not supported or unrecognized, it produces a type of "checksum" that uniquely identifies that child file. This same checksum number is used in the parent file in association with the link pointing to that child file.
It is not necessary to also write this checksum into the child file because the same child file will always produce the same checksum when LinkFixer Advanced encounters the child file again during the Cure process (unless the file has subsequently been modified).
This use of checksums gives LinkFixer Advanced the ability to inoculate and cure links that point to files of practically any type.