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 describes the sound of blowing in a shell, which he heard on one of their excursions and which the natives used to tell them to get away from the volcano.
Text on source
We were thinking to go on towards it, as we had hitherto met with no bad accident, nor seen so much as a single native on our walk: however, our voices must have alarmed some of them in the plantations along which we passed, for we presently heard one or two blowing on great conchs, which, among many savage nations, and particularly in the South Seas, are used to alarm the country. At this sound we instantly resolved to retreat, and got safely down to the solfatarra which we had last discovered, unseen by any of the natives.
English translation
Folios/Pages
p. 298
Date
1774 08 11
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.