Differences Triple Spaces = Active Triple Spaces

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Differences Triple SpacesActive Triple
Spaces

• Vlad Tanasescu _at_ KMi _at_ OU

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Differences Triple Spaces

• Triple Spaces (Fensel 2004)
• an adaptation of tuple spaces computing as a
  communication paradigm for WS aiming to comply
  with the basic principles of the Web
• Differences (Tanasescu 2007)
• an attempt to find a common ground to various KR
  models in a cognitively sound way, in order not
  to exclude any expression of possible meaning

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Triple Spaces
P1
P2
ltp1, val, agt
write
read/take
ltp2, val, bgt
write
subscribe
TS2
read/take
ltp3, val, cgt
P3
write
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Why Triple Spaces?

• Time autonomy (TS can be accessed anytime)
• Location autonomy (TS have they own storage
  space)
• Reference autonomy (provider and reader dont
  have to know about each other)
• Data schema autonomy (RDF)

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Why Differences?

• Some domains (notably GIScience) use various KR
  paradigms
• image schemata, conceptual spaces, affordances,
  multi-representation, ...
• Some of them dont use the notion of categories,
  classes or instances
• Is there a common ground? Meaning?
• how to integrate this to the semantic web?

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Differences

• A Difference is anything that can be isolated by
  an actual process
• e.g. colours for the non expert, for an artist,
  for a machine (digital, physical, ...)
• The process is the difference
• Hypothesis meaning is only composed of
  differences processing other differences

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Differences
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Use Case
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Use Case Model
chemical
electro-chemical
numerical
computational
qualitative
cognitive
administrative
cognitive
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Use Case as TS
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Use Case as TS II
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A Generic Query
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Query decomposition as active triples
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Query caching as active triples
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Lazy updates of active triples
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To sum up

• Modelling knowledge by active triples allows
• Query decomposition
• Query caching
• Lazy updates
• These mechanisms may allow dramatic improvements
  at large scale

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Future Work

• Decompostion and caching of sparql queries
• How to implement laziness
• Evaluation
• Thank you