By Sebastian Ryszard Kruk
Libraries have regularly been an idea for the factors and applied sciences built by way of semantic internet actions. in spite of the fact that, aside from the Dublin middle specification, semantic net and social networking applied sciences haven't been largely followed and extra built through significant electronic library projects and tasks. but semantic applied sciences supply a brand new point of flexibleness, interoperability, and relationships for electronic repositories.
Kruk and McDaniel current semantic web-related points of present electronic library actions, and introduce their performance; they express examples starting from basic architectural descriptions to specified usages of particular ontologies, and hence stimulate the notice of researchers, engineers, and strength clients of these applied sciences. Their presentation is done by means of chapters on present prototype platforms reminiscent of JeromeDL, BRICKS, and Greenstone, in addition to a glance into the potential way forward for semantic electronic libraries.
This booklet is geared toward researchers and graduate scholars in parts like electronic libraries, the semantic net, social networks, and knowledge retrieval. This viewers will make the most of distinctive descriptions of either today’s probabilities and likewise the shortcomings of making use of semantic net applied sciences to massive electronic repositories of usually unstructured data.
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Additional resources for Semantic Digital Libraries
A class can never be an individual at the same time (it is possible in RDFS or OWL Full). Datatype subproperties can only be constructed from datatype properties and object subproperties from object properties. A datatype property can not be inverse/functional. Transitive properties can not have specified cardinality. In OWL DL we can use annotation properties (to annotate our ontology) only with classes, properties, individuals and ontology headers. Annotation properties can not be datatype or object properties at the same time (they can be in OWL Full), can not have subproperties, can not have range and domain, etc.
For example, some languages allow datatype reasoning, other not. 1 Existing Reasoning Engines A short description of several existing tools, implementing different languages, which can be used for reasoning: • Jena  is an open source framework written in Java useful for building Semantic Web applications. It provides tools for manipulating RDF graphs, with help of OWL and RDFS technology. One of Jena’s tools is a rule-based inference engine, which can be used for reasoning. Jena also supports RDQL , the query language for RDF.
Hundreds of ontologies are already listed in on-line ontology libraries [53, 188]. 2 Ontology Terms There are some terms established in the field of ontologies. So far, some of these terms were used without their formal definition. Most of them are pretty straightforward and a reader can subconsciously devise what we mean when we say, for example, that “something belongs to class X”. Nevertheless, it is a good idea to clearly state the meaning of words we use: • A Class, sometimes called a Concept in the ontology is a way to represent general qualities and properties of a group of objects.