What terms have people used for this in the past. I'm going to add as answers some of the attempts I've had in the past, but I don't like them or I wouldn't be asking...
There's not a lot in the literature.
There are a few influences you might be able to draw upon. Fundamentally, every recorded event is an
X happened is shorthand for
We observed side effects we attributed to X. Sometimes people will use
In most cases, an event is a reaction to a
Change somewhere (in some cases, the change is simply the time of the observation).
You can look to ISO-8601 for inspiration, but I don't find those two things satisfactory; they are adequate for describing representations of time, but not particularly good at identifying things happening during various time intervals.
In my domain language I need to distinguish between these two concepts, since both need to be expressed in the domain.
Are you sure? If the same word is being used the domain to mean the same thing, then maybe in that domain they are the same thing.
a point in time is kind of a suspect construction; in practice, most times that we discuss are approximate. "The event starts at 6" isn't a precise description of the timing, but rather a tag that indicates that the period in question is an interval that (probably) contains the moment 6.
So that would be my first guess, that all events are
Events, and they all have a
Period associated with them, which may be wide or narrow.
One possibility is to dig around in schema.org, looking to see if there is a spelling that aligns with the concepts you want to distinguish.
An event happening at a certain time and location, such as a concert, lecture, or festival
That's not bad, but finding the alternative might be tricky
The act of accomplishing something via previous efforts. It is an instantaneous action rather than an ongoing process.
Actions have status, that includes states like http://schema.org/CompletedActionStatus
I didn't find anything obviously satisfactory. The approach I would recommend is to find a domain roughly in alignment with yours, and then explore:
The bottom of each of those has a "More Specific Types" entry that may include a useful thread to pull.
Naming is one of the two hard problems.