This is a good discussion to have. Blindly following a spec never gets you 100% where you want to go.
Instead: what are reasonable storage options that as a developer using cordova you would like to see? Once that is decided on, define a simple spec for each of the options. So for the first question, in my mind having an idea of a "temporary" storage space - like Joe said, volatile memory - and "persistent" seem like two good options. Then, for simple constraints around the two options: To me, persistent is: data that I write to a persistent location is available across device restarts and will not be removed unless my application explicitly removes it (barring exceptional circumstances such as a device factory reset). The Android "Jail" is, for me, a good candidate to be considered the persistent storage location. A removable storage type such as an SD or media card is, in my mind, not a candidate to "persistent" storage. For temporary storage, the restrictions are much less. Figuring out any minimum time frames for how long a temporary storage location exists seems important. Should temporary storage be guaranteed across device restarts? Probably not. What about across application restarts? I'm not sure - I would say no, not guaranteed. Within an application session? I think so. Etc. etc. :)
