XPath query to select all href attributes of tag, which 'class' attribute equals specified string

Question

I don\'t know why following query doesn\'t work:

//a/@href[@class=\'specified_string\']

Answer 1

You basically say that you are looking for an attribute named href, whose attribute (this is the error) class should be equal to specified_string.

But you need to find the attribute href of an element a, whose attribute class is specified_string.

(ndim's answer overlapped mine)