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.
Zaccaria Pagani describes the screams of the Moors from the bell towers of the mosques, describing what they say and what he hears on Domenico Trevisan's journey.
Text on source
Moschee Infenite, de imensa belleza. et alcune di grandeza inestimabile. Tute cum li suoi Campanili sfogiati sopra de li quali per non si sonar campane in queste parte. Mori Cridano le sue hore. et cominciano do hore avanti giorno Cridano el Tysbi, A megio giorno lodar, A 21 hora laxera, A 24 hore el magrebo, et ha do hore di nocte la sya. Cridano anchora a Tute queste hore per la Corte del Soldano. et per tuti li bazari. digando Queste parole: Dio fo. et Dio sera. et Mahumet resusitera. Mori de Dio andati a far le vostre orationi et lori quando senteno queste tal voce post pongono ogni cossa. et dove si atrovano fano oration. La qual fornita guardando verso al Ciello si metteno ambedui le mano sopra il viso.
English translation
Folios/Pages
ff. 74-75
Date
1512 07 circa
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.