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.
Leaving the island of Tanna, Georg Forster offers some reflections on the life of its inhabitants and the natural characteristics of the island. He reiterates the supremacy of the Tanna islanders' music among the islands of the South Seas.
Text on source
The domestic life of the people of Tanna is not wholly destitute of amusements; they are at present indeed of a more serious turn than the civilized nations of the Friendly and Society Islands, and the more savage inhabitants of Mallicollo: but, on the other hand, their music is in greater perfection than any in the South Sea; and it cannot be disputed that a predilection for harmonious sounds implies great sensibility, and must prepare the way for civilization.
English translation
Folios/Pages
p. 361
Date
1774 08 20
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.