Semantic Web for the Working Ontologist: Effective Modeling in RDFS and OWL

By Dean Allemang, James Hendler

The promise of the Semantic net to supply a common medium to interchange information info and information has been good publicized. there are various resources too for uncomplicated details at the extensions to the WWW that let content material to be expressed in usual language but utilized by software program brokers to simply locate, percentage and combine info. before members engaged in growing ontologies-- formal descriptions of the strategies, phrases, and relationships inside of a given wisdom domain-- have had no resources past the technical criteria records.

Semantic internet for the operating Ontologist transforms this knowledge into the sensible wisdom that programmers and topic area specialists desire. Authors Allemang and Hendler start with ideas to the elemental difficulties, yet don’t cease there: they exhibit tips on how to enhance your individual strategies to difficulties of accelerating complexity and confirm that your abilities will preserve velocity with the ongoing evolution of the Semantic internet.

• presents useful info for all programmers and subject material specialists engaged in modeling info to slot the necessities of the Semantic Web.
• De-emphasizes algorithms and proofs, focusing as an alternative on real-world difficulties, inventive recommendations, and hugely illustrative examples.
• provides exact, ready-to-apply “recipes” to be used in lots of particular situations.
• exhibits the best way to create new recipes from RDF, RDFS, and OWL constructs.

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CheckedOut rdfs:subPropertyOf borrows. when we have inferred that borrows and checkedOut are rdfs:subPropertyOf each other, we will be able to make the entire applicable inferences. once we convey new constructs (like owl:equivalentProperty during this part) to constructs we already recognize (rdfs:subPropertyOf and owl:SymmetricProperty), we explicitly describe how some of the components of the language healthy jointly. that's, instead of simply noticing that the guideline governing owl:equivalent estate is similar rule because the person who governs rdfs:subPropertyOf (except that it really works either methods! ), we will truly version those proof. via making owl: equivalentProperty a subproperty of rdfs:subProperty Of, we explicitly assert that they're ruled by means of an analogous rule. by way of making owl: equivalentProperty an owl:SymmetricProperty, we assert the truth that this rule Equivalence 173 works in either instructions. This makes the connection among the elements of the OWL language specific and, actually, versions them in OWL. similar members type equivalence—that is, owl:equivalentClass—and estate equivalence (own:equivalentProperty) supply intuitive how you can convey relationships that have been already expressible in RDFS. during this feel, neither of those constructs has elevated the expressive strength of RDFS-Plus past what used to be already to be had in RDFS. They has simply made it more uncomplicated to precise and clearer to learn. those constructs refer respectively to periods of items and the houses that relate them. but if we're describing issues on this planet, we aren’t in basic terms describing periods and homes; we're describing the issues themselves. those are the participants of the periods. We confer with those as members. we've encountered a couple of participants in our examples so far—Wenger the Analyst, Kildare the health care provider, Kaneda the All-Star Player—and any variety of issues whose classification club has no longer been specified—Wales, The enterprise, and Moby Dick. yet take into accout the nonunique naming assumption: usually, our info comes from a number of assets that would no longer have performed any coordination of their connection with members. How can we deal with the location during which we verify that members that we initially considered individually are in reality a similar person? In RDFS-Plus, this is often performed with the one build owl:sameAs. Our outdated good friend William Shakespeare will supply us with an instance of the way owl:sameAs works. From bankruptcy three, we've the subsequent triples concerning the literary profession of William Shakespeare: lit:Shakespeare lit:wrote lit:AsYouLikeIt; lit:wrote lit:HenryV; lit:wrote lit:LovesLaboursLost; lit:wrote lit:MeasureForMeasure; lit:wrote lit:TwelfthNight; lit:wrote lit:WintersTale; lit:wrote lit:Hamlet; lit:wrote lit:Othello. believe we now have at our disposal info from the Stratford Parish sign up, which lists the subsequent details from a few baptisms that happened there. we are going to use spr: because the namespace identifier for URIs from the Stratford Parish sign in. spr:Gulielmus spr:hasFather spr:JohannesShakspere.

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