The following is a description of a Nastel XRay data model example. Please refer to The Nastel XRay data model for an explanation of terms.
In this example, “My Workday” is the main activity. This is the highest level activity and it is the relationship of other sub-activities, events and snapshots.
For example, “My Workday” consists of the following sub-activities:
- I come to work
- I go to lunch
- I have a Skype call
These sub-activities are outcomes of related events. For example, “I come to work,” consists of the following related events:
- I open the office door with my key card
- I say hello to different colleagues
- I turn on my computer
Events not related to the main activity can exist; they occur on their own without any parent activity. For example, “a bird hit a window.” It happened during your workday and you saw it in your office, but it is not related to your workday (the main activity).
The events can have snapshots. Snapshots are collections of event data aspects which can be measured statistically. Examples of snapshots for each of the above example events:
- The amount of time it took me to enter the office with my key card
- Duration of conversation with each colleague
- Duration of computer startup