public Meta(string name, string content)
{
ElementAttributes.ChainSet("name", name).ChainSet("content", content);
}
public Image(string src, string alt = null)
{
ElementAttributes.ChainSet("src", src).ChainSet("alt", alt);
}
public Link(string relType, string href)
{
ElementAttributes.ChainSet("rel", relType).ChainAdd("href", href);
}