Download Semantic Web for the Working Ontologist: Effective Modeling by Dean Allemang, James Hendler PDF

By Dean Allemang, James Hendler

Semantic internet types and applied sciences supply info in machine-readable languages that allow desktops to entry the net extra intelligently and practice projects immediately with out the path of clients. those applied sciences are fairly fresh and advancing quickly, making a set of specific demanding situations for these constructing purposes.

Semantic internet for the operating Ontologist is the basic, complete source on semantic modeling, for practitioners in wellbeing and fitness care, synthetic intelligence, finance, engineering, army intelligence, firm structure, and extra. interested in constructing helpful and reusable versions, this market-leading ebook explains easy methods to construct semantic content material (ontologies) and the way to construct purposes that entry that content.

New during this variation:

* assurance of the newest Semantic net instruments for organizing, querying, and processing info - see information in TOC below

* unique info at the most recent ontologies utilized in key net purposes together with ecommerce, social networking, information mining, utilizing executive information, and more
* up-to-date with the most recent advancements and advances in Semantic net applied sciences for organizing, querying, and processing details, together with SPARQL, RDF and RDFS, OWL 2.0, and SKOS
* specific details at the ontologies utilized in today's key net functions, together with ecommerce, social networking, facts mining, utilizing executive info, and extra
* much more illustrative examples and case reviews that reveal what semantic applied sciences are and the way they interact to unravel real-world problems

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Extra info for Semantic Web for the Working Ontologist: Effective Modeling in RDFS and OWL (2nd Edition)

Example text

This phenomenon is so widespread that most government systems include a process (usually involving a court magistrate and possibly a committee of citizens) whereby disputes over the interpretation of a law or its applicability can be resolved. When a model relies on particulars of the context of its reader for interpretation of its meaning, as is the case in legislation, we say that a model is informal. That is, the model lacks a formalism whereby the meaning of terms in the model can be uniquely defined.

Shakespeare, Stratford, “the value of X,” and “all the cows in Texas” are all examples of things someone might talk about and that can be resources in the Semantic Web. This is admittedly a pretty odd use of the word resource, but alternatives like entity or thing, which might be more accurate, have their own issues. In any case, resource is the word used in the 27 28 CHAPTER 3 RDF—The basis of the Semantic Web Semantic Web standards. In fact, the name of the base technology in the Semantic Web (RDF) uses this word in an essential way.

2. We can continue in this way, describing the relationships among all the concepts we have mentioned so far: IAU:DwarfPlanet and IAU:SSSB. As we go down the tree, each class refers to a more restrictive set of entities. In this way, we can model the commonality among entities (at the high level) while respecting their variation (at a low level). 1 Subclass diagram for different notions of planet. 2 More detailed relationships between various notions of planet. Variation and layers Classes and subclasses are a fine way to organize variation when there is a simple, known relationship between the modeled entities and it is possible to determine a clear ordering of classes that describes these relationships.

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