- listname, listcommand, refprefix, allowed_placement,
- htmltag, htmlattr, htmlstyle, requires, usesfloat,
- ispredefined, allowswide, allowssideways);
+ listname, listcommand, refprefix, allowed_placement,
+ htmltag, htmlattr, htmlstyle, required, usesfloat,
+ ispredefined, allowswide, allowssideways);