- Zip your file(s) into a zip-file, not rar!
- Put you initials somewhere in the filename. Eg:
lesson1_NML.zip
- Mail the zip-file to nml@eaaa.dk
- Put the token iau3 somewhere in the subject, eg:
Assignments iau3
- Keep the file(s) for future use and reference
Take a close look at the ER model in Figure 1, “Example of an ER Model”.
Answer the following questions.
-
How many pages does a site (root) allow, and why?
-
What happens if someone inserts an extra page into
the database referring to a given site? Why?
-
Links of type 'A' constitute the main navigation.
What happens if a page is inserted without a link to it
from the front page?
-
Can you insert a link from the front page to a page
that does not exist? Reason?
-
May an image be used on more pages simultaneously?
Reason?
-
Is it possible to limit the listing of pages to those
belonging to a specific root? Please use your imagination
and try to figure out how?
-
Is it possible to write site name at the top of
the display of each page belonging to the site.
If yes, how?
A school or a college wants an IT system holding
classes among other information areas. The admin office
would like to be able to print lists of the students from
a class. They must show names, addresses, email addresses, etc.
They must also be able to see which teacher teaches
what subject in any class.
The students would like the system to tell them what
teacher they are facing in any given subject.
Design an ER model and discuss it.
The local census bureau has been asked by the tax people
for information about marriages in a given year. They want to
know who married who and when.
The list must uniquely identify the persons, their names
and addresses.
Please design the appropriate ER model and discuss it.