private static Parser<string> Node(string tagName, Attribute attribute) =>
(from openTag in TagParser.OpenTag
where openTag.Name == tagName
where ((OpenTag)openTag).Attributes.Any(atr => atr.Key == attribute.Name && atr.Value == attribute.Value)
from content in Item.Many()
from closeTag in TagParser.CloseTag(openTag)
select string.Join(string.Empty, content)).Token();
public static Parser<string> FindTag(Attribute attribute) =>
from dirt in Parse.AnyChar.Except(Node(attribute)).Many()
from content in Node(attribute)
select content;