A bit of background: I recently attended JEHES XVI, a Star Wars-themed event organized by HoloRed Sevilla which featured, among a lot of other things, an impressive 2ish-meter-long cardboard model of an Imperial Star Destroyer, which can be briefly seen in this summary video montage:
Now, that model had both a ventral hangar bay big enough to accommodate a CR-90 "blockade runner" Corellian corvette...
...and 4(!) lateral hangar bays, big enough to hold squadrons of TIEs or a YT-2400 freighter:
(Unfortunately I haven't been able to find any publicly-available wide shots of that model showing the position of the lateral hangar bays)
Now, given that I spent quite some hours of my youth playing the 1993 X-wing videogame, I know for certain that ISDs have ventral hangar bays, and not lateral hangar bays. At least, I'm fairly sure that the Imperial I-class, the Imperial-II-class and the Victory-I-class SDs have only ventral hangar bays, according to the information available to me on the Wookieepedia.
So as a good nerd would do, I confronted some of the event staff about that minor detail of Star Wars canon (because, let's face it, we love having that kind of conversation). Their response was that the model is based on canon information indeed, and is modeled off the ISDs from the Battlefront II video game. In particular, the Battlefront II wiki page about ISDs states:
The Imperial Star Destroyer, also known as the Imperator-class Star Destroyer, is an Imperial starship featured in Star Wars: Battlefront II. [...] It features two hangars, one on the starboard side, and one on the port side, although, only the port side one is usable in naval combat.
However, the distinction between Imperial I-class and Imperator-class is fuzzy, because Wookieepedia states:
The Imperial I-class Star Destroyer, also known as the Imperial I-class Destroyer or the Imperator-class Star Destroyer, was an iconic class of warships [...]
Furthermore, I've watched some gameplay footage of both SW:BF1 and SW:BF2 (about scenarios involving a Imperial I-like ISD) and I have failed to see any evidence of lateral hangar bays.
So I'm confused about ISD classes, and which (if any of them) have lateral hangars. This prompts a few closely related questions:
Are Imperial I-class and Imperator I-class the same or different?
According to canon (and ignoring SW:BF2), are there any ISDs with lateral hangar bays?
The (canon or non canon) ISDs with lateral bays, do they have a ventral hangar/cargo bay too, or is that space occupied by something else?