Please note that all relationships with this element, and all its children will be deleted as well.
What does this mean?
Parent, Children and Cascade deletions
"Children" elements are elements that directly depend on another object (the "parent").
They only have sense in a certain context, and if the context to which they belong is removed, to mantain data meaning and integrity the application provides also the removal of them (now become "orphans").
Example
Take the case of a Travel and of the Events occurred during it.
In this example, deleting a Travel will leave all of its Events meaningless since, taken alone, they would have no context in which to place themselves, nor a way to reach them.
Consequently, the removal of a Travel also causes the elimination - cascading - of all Events that occurred in that Trip.
Important
Note that this operation is not limited to one level of relationship, but proceeds with children of deleted children and so on, until the entire database is freed from unnecessary data.
This lets the user remove all data about a Travel by simply deleting that Travel.
Georg Forster recounts what his father told him about the afternoon excursion to the island.
Text on source
At the landing-place the natives welcomed us with shouts as in the morning, and the croud being as numerous as ever, the trade was carried on very briskly, but provisions were scarce, and shaddocks in particular not at all to be had, as the season was not yet sufficiently advanced.
English translation
Folios/Pages
p. 440
Date
1773 10 02
Observations on the events description
The dots on the map indicate the places where sound and music events were described. They don't represent travel stages.