[greglindahl]

Is that kind of data called an "index" by any community, though? Seems quite confusing to me, and you can see some of the other folks commenting here that it's confusing.

[b4hand]

We do have a traditional inverted index over anchor text. That's just one aspect of our data set though.

Originally, that was a larger focus and that's the name we've always called it. I could see how that might be confusing.

However, I do think the common name for the data that we collect is called a backlink index, at least in our industry.

[greglindahl]

Ah, that's pretty neat that you have an inverted index in there. I'm about to build one for the Wayback machine.