upper; if the name contains letters of both cases, then it is not changed.
For example, @|foo45| becomes @|FOO45|, or \emph{vice-versa}; but @|Splat|
remains as it is. Second, the name is subjected to \emph{separator
- switching}: all underscores in the name are replaced with hyphens (and
+ switching}: all underscores in the name are replaced with hyphens (and
\emph{vice-versa}, though hyphens aren't permitted in identifiers in the
first place). Finally, the resulting name is interned in the current
package, which will usually be @|sod-user| unless changed explicitly by the
class. It is an error if any of these @<identifier>s does not name a defined
class. The superclass list is required, and must not be empty; listing
@|SodObject| as your class's superclass is a good choice if nothing else
-seems suitable. It's not possible to define a \emph{root class} in the Sod
-language: you must use Lisp to do this, and it's quite involved.
+seems suitable. A class with no direct superclasses is called a \emph{root
+class}. It is not possible to define a root class in the Sod language: you
+must use Lisp to do this, and it's quite involved.
The @<properties> provide additional information. The standard class
properties are as follows.