At this point we're considering it a foundational concept to build around - web content changes, so our best option currently is to make the query as easy as possible to change, and alert when things break.

We have done some preliminary work in some AI or other intelligence for pattern recognition to be able to handle structural changes better, but still have lots of work.

But the expanding and querying concepts also make a lot of sense with APIs, which tend to be a little more stable.