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single spot in the information landscape. Unless they are

filtered out with dynamic queries and nesting or unless they

are manually assigned exclusively to one portal, each item

in the information space is placed in each of the portals.

This allows a flexible complementary use of different

visualizations depending on the current information need.

Figure 4. A zoom into a map visualization allows a

geographical access to documents. Furthermore a bounding

box is drawn to select the Eastern regions of the US.

Figure 5. The bounding box in figure 4 is transformed into a

portal visualizing the contained documents in a scatter plot.

ZOIL Design Principle 4: The Information Space as

Information Landscape

All PIM tasks of a user take place within the user’s single

“personal space of information” (PSI) that “includes all

information items that are, at least nominally, under that

person’s control.” [22, p. 10] A user’s PSI spans the virtual

and physical world and contains a great variety of

information forms ranging from the physical book in the

bookshelf to the text message on the mobile phone. Since

the PSI’s content and boundaries are uncertain and

constantly changing, an information system can neither

provide an complete overview of a person’s PSI nor can it

process the whole PSI to search or manage all PICs or

information items within. However, for facilitating PIM

tasks it appears reasonable that a digital PIM environment

should try to integrate and provide as much of the PSI and

the contained PICs as possible – regardless of the

information form or source.

Figure 6. A mock-up of a ZOIL-based library catalog. The

amount of displayed information is reduced by specifying the

desired years of publication (“Jahr”) and the name of a

desired cast member (“Personen”).

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Zoom 5809 Manuale Utente Pagina 6