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the definition of hyperstructure above, then discuss it |
the definition of hyperstructure above, then discuss it |
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in light of the "connotations" of hyperstructure. |
in light of the "connotations" of hyperstructure. |
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.. The RDF structure (`Lassila and Swick 1999`_) is a graph containing |
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three types of nodes: Nodes identified globally by a URI, |
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"blank" nodes with identifiers local to a graph, and |
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*literals* (explicit values such as strings and numbers). |
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An RDF graph is a set of triples containing a *subject*, |
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*predicate* and *object* nodes (literals can only occur |
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as objects), which are interpreted as edges in the graph; |
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the subject and object are vertices, the predicate |
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is a label. |
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Our work is based on using the Resource Description Framework |
Our work is based on using the Resource Description Framework |
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(RDF, `Lassila and Swick 1999`_) as a hyperstructure. |
(RDF, `Lassila and Swick 1999`_) as a hyperstructure. |
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In the examples we have given above, we have assumed the use of RDF. |
In the examples we have given above, we have assumed the use of RDF. |
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to the same item by using different properties. Properties |
to the same item by using different properties. Properties |
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are the RDF equivalent to zzstructure's dimensions. |
are the RDF equivalent to zzstructure's dimensions. |
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RDF triples are not associated with a context. |
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For example, one cannot create two triples saying that |
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"Paper A supports paper B" and "Paper A contradicts paper B," |
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and then say that the first triple is true under one set |
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of assertions and the second under another set. |
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To represent this information in RDF, one would not |
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use a direct connection between the papers; rather, |
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one would create new nodes for both statements, |
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and connect them to the two papers as well as to the |
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sets of assetions under which either statement is true. |
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(This is how statements about more than two nodes |
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are generally represented in RDF.) |
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Visualizations of RDF... [keep current paragraphs here] |
Visualizations of RDF... [keep current paragraphs here] |
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...herculean task. |
...herculean task. |
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----------------------------------------- |
----------------------------------------- |
565 |
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566 |
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Acknowledgements |
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================ |
569 |
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Mention all people that have been in the group, |
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i.e. also Katariina Ervasti, Rauli Ruohonen, Kimmo Wideroos. |
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Thank anonymous referees. |