!!! These features are recent changes to ScriptFu version 3. There might be bugs in the current implementation. About This is a language reference for the string-like features of Script-fu’s TinyScheme language. This may differ from other Scheme languages. This feature is different in ScriptFu version 2 and the upstream TinyScheme. TinyScheme is a subset of R5RS Scheme, and ScriptFu has more than the original TinyScheme because it has been modified to support unichars and bytes.