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4.2.1 RDF Focus+Context views |
4.2.1 RDF Focus+Context views |
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""""""""""""""""""""""""""""" |
""""""""""""""""""""""""""""" |
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In this section, we describe our visualizations of RDF XXX |
In this section, we describe our basic visualization of RDF |
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as an easily browsable hyperstructure, |
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- our 'basic hyperstructure' visualization of rdf |
a focus+context (`Furnas 1985`_) view of the graph. |
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The *focus* at any point is an RDF node, which is shown |
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in the middle of the screen; the *context* is the nodes |
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connected to this node, shown around the focus. |
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.. figure:: carli-small.png |
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Figure XXX: Screenshot of RDF browser prototype. |
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This figure shows the same structure as Figure 1 XXXlink. |
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(`Larger image`__) |
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__ carli.png |
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No attempt is made at presenting the whole graph |
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in a two-dimensional layout, or at avoiding overlapping lines, |
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as many graph-layout algorithms do. We simply show the current |
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focus in the center, the connected nodes on an ellipse around |
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the center, the items connected to *those* nodes a bit further out, |
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and so on [#disorientation]_. |
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- wheel: f+c (see fig.1) |
- wheel: f+c (see fig.1) |
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that is not part of the medium of presentation. |
that is not part of the medium of presentation. |
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.. [#fig1note] This visualization is a focus+context (`Furnas 1985`_) |
.. [#fig1note] This visualization is a focus+context (`Furnas 1985`_) |
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view of the item graph. |
view of the item graph. See section 4.2.1 XXXlink for details. |
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No attempt is made at presenting the whole graph |
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in a two-dimensional layout, or at avoiding overlapping lines, |
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as many graph-layout algorithms do. We simply show the current |
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items in the center, the linked items on an ellipse around |
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the center, the items linked to the linked items around the |
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items they are linked to, and so on. [XXX less linkedy-linked] |
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As the current item and the items related to it are always |
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in the foreground, we hope that this view will not |
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cause disorientation. However, we have not done any |
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user-testing, yet. |
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.. [#notalwayseverything] You will not always want to see |
.. [#notalwayseverything] You will not always want to see |
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*all* types of information, though. For example, |
*all* types of information, though. For example, |
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recommends for discussing the structure used in ZigZag(TM), |
recommends for discussing the structure used in ZigZag(TM), |
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(Nelson's trademark). |
(Nelson's trademark). |
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.. [#disorientation] As the focus and the nodes connected to it |
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are always in the foreground, we hope that this view will not |
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cause disorientation. However, we have not done any |
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user-testing, yet. |
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.. [#libvob-speed] For some changes (scrolling, zooming), the scene |
.. [#libvob-speed] For some changes (scrolling, zooming), the scene |
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need not be regenerated but only the coordinate system |
need not be regenerated but only the coordinate system |