internal SourceExpression(CompleteExpressionType eType, Type type)
			: base(eType, type)
		{
		}
		internal TableValueExpression(CompleteExpressionType eType, Type type)
			: base(eType, type)
		{
		}
		protected CompleteExpression(CompleteExpressionType eType, Type type)
		{
			this._NodeType = (ExpressionType)eType;
			this._Type = type;
		}