static Run() { NodeType = new NodeType(typeof(Run).Name, ElementName, typeof(Run)); }
static Group() { NodeType = new NodeType("Group", ElementName, typeof(Group)); }
static Macro() { _nodeType = new StyleNodeType("macro", Macro.ElementName, typeof(Macro)); }
static Filter() { NodeType = new NodeType("Conditional", ElementName, typeof(Filter)); }
static Variable() { _nodeType = new StyleNodeType(Text, Variable.ElementName, typeof(Variable)); }