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.
Drums are beaten on the rooftops of Timbuktu by people assuming that Muḥammad al-Ṣādiq was going to become askia.
Text on source
واعملوا اللعب اطلعوا الطبل فوق سطح الديار وضربوه فرحَ بولاية محمّد الصادق لانّا اهل تنبكت يحبّونه كثيرا فقد غرّ نفسه وغرّهم [ص. ١٢٥]
English translation
They launched a celebration and beat drums [ṭabl] on the rooftops for joy at the accession of Muḥammad al-Ṣādiq, since he was greatly loved by the people of Timbuktu. But he deceived himself and led them astray
Folios/Pages
172
Date
1588 04 18 circa
Observations on the events description
Hunwick (2003, p. 280, n. 46) notices that according to this and other passages, at least some of Timbuktu's houses should have had flat rooftops where music would be played. It is to be noted that "drum" is in the singular [ṭabl].
The dots on the map indicate the places where sound and music events were described. They don't represent travel stages.