• By Franz Inc.
  • 27 March, 2018

Gruff Time Machine Tutorial

Here is an example for trying out the new time slider in Gruff’s graph view. It uses triples from that contain a history of corporate acquisitions and funding events over several years. Gruff’s time bar allows you to examine those events chronologically, and also to display only the nodes that have events within a specified date range.


  • Create a new triple-store and used “File | Load Triples | Load
    N-Triples” to load that triples file into the new triple-store. Use
    “File | Commit” to ensure that the loaded triples get saved.


  • Select “Visual Graph Options | Time Bar | Momentary Time Predicates”
    and paste the following five predicate IRIs into the dialog that
    appears. The time bar will then work with the date properties that
    are provided by these predicates, whenever you are browsing this
    particular triple-store.

  • Select “View | Optional Graph View Panes | Show Time Bar” to reveal
    the time bar at the bottom of the graph view. The keyboard shortcut
    for this command is Shift+A to allow quickly toggling the time bar
    on and off.


  • Select “Display | Display Some Sample Triples” to do just that. The
    time bar will now display a vertical line for each of the requested
    date properties of the displayed nodes. Moving the mouse cursor
    over these “date property markers” will display more information
    about those events.


  • Click down on the yellow-orange rectangle at the right end of the
    time bar and drag it to the left. This will make the “time filter
    range” smaller, and nodes that have date properties that are no
    longer in this range will temporarily disappear from the display.
    They will reappear if you drag the slider back to the right or
    toggle the time bar back off.

For more information, the full time bar introduction is in the Gruff documentation under the command “View | Optional Graph View Panes | Show Time Bar”.

Check out the “Chart Widget” for showing date properties of the visible nodes.


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