Explore time-aware webgraphs

[sebastian-nagel]

Explore time-aware webgraphs:

• are they useful to represent the graphs of a series of monthly crawls?
• even on the aggregation of hosts or domains?

See

• CC group discussion about time-aware graphs
• work done by the authors of the webgraph framework: https://law.di.unimi.it/webdata/uk-union-2006-06-2007-05/