A Developers Guide to the Semantic Web by Liyang Yu

By Liyang Yu

The Semantic internet represents a imaginative and prescient for the way to make the large quantity of data on the internet instantly processable by way of machines on a wide scale. For this objective, an entire suite of criteria, applied sciences and similar instruments were distinctive and constructed over the past couple of years, they usually have now develop into the basis for varied new applications.

A Developer’s advisor to the Semantic Web is helping the reader to benefit the middle criteria, key parts, and underlying recommendations. It presents in-depth assurance of either the what-is and how-to elements of the Semantic net. From Yu’s presentation, the reader will receive not just an exceptional knowing concerning the Semantic net, but in addition methods to mix all the things to construct new purposes at the Semantic Web.

Software builders in and scholars focusing on net improvement or Semantic internet applied sciences will locate during this publication the main whole advisor to this intriguing box to be had at the present time. in response to the step by step presentation of real-world tasks, the place the applied sciences and criteria are utilized, they're going to collect the data had to layout and enforce cutting-edge applications.

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These documents all together describe different aspects of RDF. One fundamental concept of RDF is its abstract model that is used to represent knowledge about the world. In this section, we will learn this abstract model in detail. 1 The Big Picture Before we get into the details, let us first take a look at the big picture of this abstract model, so it will be easier for you to understand the rest of its content. The basic idea is straightforward: RDF uses this abstract model to decompose information/knowledge into small pieces, with some simple rules about the semantics (meaning) of each one of these pieces.

The goal is to provide a general method that is simple and flexible enough to express any fact, yet structured enough that computer applications can operate with the expressed knowledge. This abstract model has the following key components: • statement • subject and object resources • predicate And we will now discuss each one of these components, and we will then put them together to gain understanding of the abstract model as a whole. 2 Statement As we have discussed, the key idea of RDF’s abstract model is to break information into small pieces, and each small piece has clearly defined semantics so that machine can understand it and do useful things with it.

2 The Abstract Model of RDF 27 In the world of RDF, the thing that a given subject or object denotes, be it concrete or abstract, is called resource. Therefore, a resource is anything that is being described by RDF statements. With this said, both subject and object in a statement are all names for resources. The question now is how do we come up with these names? This turns out to be a very important aspect of the RDF abstract model. Let us discuss this in detail in the next section. 1, which contains a list of statements about Nikon D300 camera as a resource in the real world.

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