Hey Tim, I lost track of this, sorry.
If the cell’s ID surfaced as a fragment ID, then the https://www.w3.org/TR/annotation-model/#h-fragment-selector could be appropriate.
As it happens, Hypothesis used to record a FragmentSelector with annotations but there wasn’t a compelling use for it.
Here’s an example of an annotation that did record a FragmentSelector:
https://jsoneditoronline.org/?url=https://hypothes.is/api/annotations/9mT3gsbQEeag7MOeBozdXQ
Drill down into target -> selector and you’ll find 4 selectors.
The value of the FragmentSelector (the one we don’t use any more) is main, because that’s the governing id (<div id=“main” role=“main”>).
If cells had ids, and if we reinstituted the use of FragmentSelectors, that could be a nice combination.