+Changes since 0.4.0:
+
+ Newly implemented commands and statistical features:
+
+ * CLOSE FILE HANDLE (a PSPP extension; see below).
+
+ * REGRESSION.
+
+ * XEXPORT (a PSPP extension).
+
+ New PSPP extension:
+
+ A new PSPP extension called "scratch files" has been implemented.
+ A scratch file, like a system file, consists of a dictionary and
+ any number of cases. A sufficiently small scratch file is stored
+ in memory; if it grows too large, it is written to disk. By
+ default, any file handle whose name begins with # is assumed to
+ refer to a scratch file.