Practical RDF

By Shelley Powers

The source Description Framework (RDF) is a constitution for describing and interchanging metadata at the Web--anything from library catalogs and all over the world directories to bioinformatics, Mozilla inner info constructions, and information bases for synthetic intelligence initiatives. RDF presents a constant framework and syntax for describing and querying info, making it attainable to proportion site descriptions extra simply. RDF's services, despite the fact that, have lengthy been shrouded by way of its attractiveness for complexity and a tough kinfolk of requirements. Practical RDF breaks via this attractiveness with instant and solvable difficulties that will help you comprehend, grasp, and enforce RDF solutions.Practical RDF explains RDF from the floor up, offering real-world examples and outlines of ways the expertise is getting used in functions like Mozilla, FOAF, and Chandler, in addition to infrastructure you should use to construct your individual purposes. This booklet cuts to the guts of the W3C's frequently vague requirements, providing you with instruments to use RDF effectively on your personal projects.The first a part of the publication specializes in the RDF requirements. After an creation to RDF, the booklet covers the RDF specification files themselves, together with RDF Semantics and ideas and summary version standards, RDF constructs, and the RDF Schema. the second one part makes a speciality of programming language aid, and the instruments and utilities that permit builders to check, edit, parse, shop, and manage RDF/XML. next sections concentrate on RDF's info roots, programming and framework help, and functional implementation and use of RDF and RDF/XML.If you must know the way to use RDF to info processing, Practical RDF is for you. even if your pursuits lie in large-scale info aggregation and research or in smaller-scale tasks like web publication syndication, this e-book will give you an excellent origin for operating with RDF.

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Ix 1. RDF: An creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 The Semantic internet and RDF: a quick historical past The requirements while to exploit and never Use RDF a few makes use of of RDF/XML similar applied sciences Going ahead 1 three four eight 12 12 2. RDF: middle and Soul . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 the quest for wisdom The RDF Triple the elemental RDF info version and the RDF Graph URIs RDF Serialization: N3 and N-Triples speaking RDF: Lingo and Vocabulary 15 sixteen 19 21 22 25 three. the elemental parts in the RDF/XML Syntax . . . . . . . . . . . . . . . . . . . . . . . 29 Serializing RDF to XML RDF clean Nodes URI References Representing dependent information with rdf:value The rdf:type estate RDF/XML Shortcuts extra on RDF information forms RDF/XML: Separate records or Embedded Blocks 30 forty-one forty three forty six forty seven forty nine fifty three fifty four v 4. really good RDF Relationships: Reification, bins, and Collections . . . fifty seven boxes Collections Reification: The RDF substantial gruesome fifty seven sixty five sixty seven five. vital suggestions from the W3C RDF Vocabulary/Schema . . . . . . . . . . . . . eighty three RDF Vocabulary: Describing the information middle RDF Schema components Refining RDF Vocabularies with Constraints RDF Schema possible choices eighty four 87 ninety five ninety seven 6. growing an RDF Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . a hundred How RDF Vocabularies vary from XML Vocabularies Defining the Vocabulary: company and Scope Defining the Vocabulary: parts Formalizing the Vocabulary with RDFS Integrating the Dublin middle a hundred one zero one 103 118 a hundred and twenty 7. modifying, Parsing, and perusing RDF/XML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 BrownSauce Parsers Editors 132 one hundred thirty five 142 eight. Jena: RDF in Java . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 review of the periods developing and Serializing an RDF version Parsing and Querying an RDF rfile In-Memory as opposed to chronic version garage 149 151 164 168 nine. RDF and Perl, personal home page, and Python . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 RDF/XML and Perl RDF API for Hypertext Preprocessor RDF and Python: RDFLib 173 183 187 10. Querying RDF: RDF as information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 RDF and the Relational information version Roots: rdfDB QL Inkling and SquishQL RDQL Sesame vi | desk of Contents 192 193 194 197 210 11. a short examine extra RDF software Environments . . . . . . . . . . . . . . 215 RDF and C# Wilbur—RDF API CLOS evaluation of Redland—a Multilanguage-Based RDF Framework Redfoot 215 218 218 225 12. Ontologies: RDF company versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228 Why Ontology? short background of the Ontology stream OWL Use instances and requisites OWL requisites easy Constructs of OWL Bits of information: extra complicated OWL Constructs The Complementary Nature of RDF and OWL Ontology instruments: Editors 229 229 231 232 235 239 247 248 thirteen. Subscription and Aggregation with RSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 RSS: speedy historical past RSS 1. zero: a brief creation an in depth examine the Specification Extending the Specification via Modules The RSS Modules RSS Aggregators developing your individual RSS content material construct your personal RSS customer Merging RDF/RSS records 253 254 256 263 264 268 276 278 280 14.

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