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Web of States

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The document discusses representing things and their states over time in the Web of Things. It argues that a state-based representation using attributes like :carloAt0800AM is more detailed and specific than a thing-based representation using only :carlo. States allow distinguishing between different configurations or versions of a thing, like :Firefox2 and :Firefox3.5. Representing things and their states is important for the Web of Things to accurately track changes and updates.

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Web of Things States Fariz Darari fadirra _a.t_ _d.o.t_ com @mrlogix 1
Things might change 2
Things might change 3
Things might change 4
Things might change 5
Things might change 6
Therefore, we need something more detailed than things: States 7
Example (Thing-based Representation) • Today at 8.00 AM, Carlo was happy as he was about to meet his girlfriend after a while. :carlo :hasMood :happy. • However, after meeting his GF at 10.00 AM, Carlo was sad because he just had a big argument with his GF. :carlo :hasMood :sad. 8
Example (State-based Repr.) • Today at 8.00 AM, Carlo was happy as he was about to meet his girlfriend after a while. :carloAt0800AM :hasMood :happy. • However, after meeting his GF at 10.00 AM, Carlo was sad because he just had a big argument with his GF. :carloAt1000AM :hasMood :sad. 9
Example (Thing-based Repr.) • Before Ver. 4.0, Firecat had been known to contain the bug RottenApple. :firecat :hasBug :rottenApple. :firecat :bugFree :rottenApple. • However, after Ver. 4.0, Firecat is RottenApple-free. :firecat :hasBug :rottenApple. :firecat :bugFree :rottenApple. 10
Example (State-based Repr.) • Before Ver. 4.0, Firecat had been known to contain the bug RottenApple. :firecatBeforeV4 :hasBug :rottenApple. • However, after Ver. 4.0, Firecat is RottenApplefree. :firecatAfterV4 :bugFree :rottenApple. 11
States are more detailed, more specific, & narrower. Think about software updates: :Firefox2 :hasUI 12
States are more detailed, more specific, & narrower. Think about software updates: :Firefox3.5 :hasUI 13
Also, think about wikipage updates: :Firefoxwiki02102002 :hasContent 14
Also, think about wikipage updates: :Firefoxwiki02112013 :hasContent 15
Thus, also for the Web, it’s not only about things, it’s about states Each color represents a thing. Different nodes of the same color represent states of things. 16
Credits • http://www.thebutterflysite.com/images/monarch-emerging.jpg • http://blog.lib.umn.edu/stoe0062/psy_1001%20section%2021%20s pring%202012/child_development_stages.jpg • http://fc07.deviantart.net/fs70/f/2010/004/2/2/four_seasons_by_ nalmes.jpg • http://annmccranie.net/site/images/network2.gif • Wikipedia • GitHub • http://as10.org/wp-content/uploads/2011/02/1-screenshot-firefoxmoco.png • http://www.mozilla.org/en-US/img/press/screenshot-firefoxvista.png 17

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Web of States

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