XPath syntax to extract URL from HTMLNode using HTMLAgilityPack?

What is the proper XPath syntax to grab the value of the href attribute from the following HTMLNode:

<开发者_JAVA百科;a target="_blank" class="monkeys" href="http://someurl.com" id="123">
    <span class="title">Monkeys are flying all over!</span>
</a> 

//a[@id='123']/@href

works for me.

Is //a@href what you're looking for?

Using HTMLAgilityPack, the method you'd use is:

HTMLAgilityPack.HTMLNode.GetAttributeValue("href", "")