=item number format
canonical strings have the form /[+-]\d+E[+-]\d+/ . Input values can
-have imbedded whitespace.
+have embedded whitespace.
=item Error returns 'NaN'
=item modglobal
C<modglobal> is a general purpose, interpreter global HV for use by
-extensions. While it could hold extension specific information, it is
-meant primarily for information that needs to be shared between
-extensions. Moreover, while it could be used for any kind of
-information, it is meant for information that should be not accessible
-in the usual way from the perl symbol table.
+extensions that need to keep information on a per-interpreter basis.
+In a pinch, it can also be used as a symbol table for extensions
+to share data among each other. It is a good idea to use keys
+prefixed by the package name of the extension that owns the data.
=item Move