- Compare the usability of the following 3 hypertext systems that
take different approaches to letting users pursue other
links from previously visited nodes.
- a)
- System A, that allows unlimited Returns (i.e.,
following links in reverse direction)
- b)
- System B, like HyperCard, which provides a
history option to show miniatures of the
most recently visited nodes
- c)
- System C, that shows timestamps indicating last
visit time of the user to a node, and accumulated
time indicating time spent in the node
Give 2 pros and 2 cons for each of the three approaches.
Indicate which you feel is best, and briefly explain why.
- Which of the following may be helpful for hypertext
users?
Please briefly justify your answer.
- a)
- overview diagrams
- b)
- animations to go along with following links
and with returning from a link jump
- c)
- footprints
- d)
- all of the above.
- e)
- exactly 2 out of choices a through c (which?).
- f)
- none of the above.
-
In Intermedia, what happens to links that have an anchor in a document
when that document is deleted?
- If Intermedia was ported to a Sun that supports
Remote Procedure Call functions, and which also has an
object-oriented DBMS (instead of C-Tree or a relational
DBMS), what would be the effect? Specifically, please
briefly discuss how porting Intermedia might be easier.
- Intermedia enforces several policies regarding hypermedia:
- a)
- having markers for anchors
- b)
- having a representation of anchors and their extent
- c)
- keeping anchor and link data consistent at all times
- d)
- consistent commands for editing links, displaying link
properties, and browsing links
- e)
- having cut/copy/paste operations for anchor/link data
- f)
- having active anchors
Please indicate for each of the above either (a) or (b):
a) must be enforced
by each application, or
b) are enforced primarily in the
Intermedia Layer rather than by the individual applications.