In the documentation there's an example of tagging different pieces.
Sometimes you want to tag one chunk of data that is broken up on the page in multiple places. For example, a CSV file may have separate first name, middle name, and last name columns, where your data model has only a single name type. Needle lets you collect these distributed data components into a single value by tagging the component values in pieces.
It gives an example of defining something in pieces, but the image also shows how each record is identified, is this something that can be done for more arbitrary datasets that are not as structured as an uploaded CSV?
I'm trying to define each community board on this page as a separate piece since Needlebase doesn't automatically detect it: