Where a tapped item sat in its block, so the host can attribute the interaction without having to look the item up in a list it does not own.
zero-based position of the item among those currently loaded.
number of items currently loaded in the block, or shown by a block capped with limit. Grows as further pages arrive, so it is the count at the moment of the interaction, not the size of the whole result set.
limit
The index and the total it was read against — for logs and test failures.