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Abstract

"The Semantic Web is an extension of the current Web in which information is given well defined meaning, better enabling computers and people to work in cooperation." - Tim Berners Lee, "Scientific American", May 2001. This authoritative guide shows how the "Semantic Web" works technically and how businesses can utilize it to gain a competitive advantage. It explains what taxonomies and ontologies are as well as their importance in constructing the Semantic Web. The companion web site includes further updates as the framework develops and links to related sites.

BK

85.20 Betriebliche Information und Kommunikation

Classification

85.20 Betriebliche Information und Kommunikation

Date

22. 5.2007 10:37:38

Footnote

Rez. Amazon: "Die Autoren bezeichnen das Buch im Vorwort als strategischen Führer für Führungskräfte und Entwickler die sich einen Überblick über das Semantic Web und die dahinter stehende Vision machen wollen. Genau diesem Anspruch wird das Buch auch absolut gerecht. Die ersten beiden Kapitel beschreiben die Vision sowie die Möglichkeiten, die sich durch den Einsatz der in den nachfolgenden Kapiteln beschriebenen Techniken bieten. Die Autoren schaffen es anhand vieler praktischer Szenarien (die zwar teilweise meiner Einschätzung nach schon noch in einiger Zukunft liegen, aber die große Vision des ganzen schön vergegenwärtigen) sehr schnell den Leser für die Technik zu begeistern und mehr darüber wissen zu wollen. Die nachfolgenden Kapitel beschreiben die Techniken auf den verschiedenen semantischen Ebenen von XML als Basis für alles weitere, über Web Services, RDF, Taxonomies und Ontologies. Den Autoren gelingt es die beschriebenen Techniken so kurz und prägnant zu erklären, dass sich der Leser danach zumindest ein Bild über die Techniken an sich, sowie über deren komplexes Zusammenspiel machen kann. Auch für Entwickler würde ich das Buch empfehlen, da es einen sehr guten Einstieg in viele doch sehr neue Techniken bietet mit vielen Verweisen auf weitere Literatur. Alles in allem ein sehr gelungenes Buch, das es trotz relativ geringem Umfangs schafft, einen guten Überblick über dieses komplexe Thema zu vermitteln."

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Abstract

The authors, hoping to stimulate interest in XML (Extensible Markup Language) and explain its value to the library community, offer a fine introduction to the topic. The opening chapter defines XML as "a system for electronically tagging or marking up documents in order to label, organize, and categorize their content" and then goes on to describe its origins and fundamental building blocks. Subsequent chapters address related technologies, schema development, XML-based tools, and current and future library uses. The authors argue persuasively for increased XML use, emphasizing its advantages over HTML in flexibility, interoperability, extensibility, and internationalization. Information is detailed, deftly written, and supported by numerous examples. Readers without a technological bent may find the text daunting, but their perseverance will be richly rewarded. Particularly recommended for webmasters and those working in library information systems and technical services.

Footnote

Rez. in: JASIST 57(2006) no.2, S.294-295 (J. Nelson)

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Abstract

Documents usually have a content and a structure. The content refers to the text of the document, whereas the structure refers to how a document is logically organized. An increasingly common way to encode the structure is through the use of a mark-up language. Nowadays, the most widely used mark-up language for representing structure is the eXtensible Mark-up Language (XML). XML can be used to provide a focused access to documents, i.e. returning XML elements, such as sections and paragraphs, instead of whole documents in response to a query. Such focused strategies are of particular benefit for information repositories containing long documents, or documents covering a wide variety of topics, where users are directed to the most relevant content within a document. The increased adoption of XML to represent a document structure requires the development of tools to effectively access documents marked-up in XML. This book provides a detailed description of query languages, indexing strategies, ranking algorithms, presentation scenarios developed to access XML documents. Major advances in XML retrieval were seen from 2002 as a result of INEX, the Initiative for Evaluation of XML Retrieval. INEX, also described in this book, provided test sets for evaluating XML retrieval effectiveness. Many of the developments and results described in this book were investigated within INEX.

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Abstract

Although Learning XML covers XML with a broad brush, it nevertheless presents the key elements of the technology with enough detail to familiarise the reader with the crucial markup language. This guide is brief enough to tackle in a weekend. Author Erik T Ray begins with an excellent summary of XML's history as an outgrowth of SGML and HTML. He outlines very clearly the elements of markup, demystifying concepts such as attributes, entities and namespaces with numerous clear examples. To illustrate a real-world XML application, he gives the reader a look at a document written in DocBook--a publicly available XML document type for publishing technical writings--and explains the sections of the document step by step. A simplified version of DocBook is used later in the book to illustrate transformation--a powerful benefit of XML. The all-important Document Type Definition (DTD) is covered in depth, but the still-unofficial alternative--XML Schema--is only briefly addressed. The author makes liberal use of graphical illustrations, tables and code to demonstrate concepts along the way, keeping the reader engaged and on track. Ray also gets into a deep discussion of programming XML utilities with Perl. Learning XML is a highly readable introduction to XML for readers with existing knowledge of markup and Web technologies, and it meets its goals very well--to deliver a broad perspective of XML and its potential.

Footnote

Rez. in: JASIST 52(2001) no.12, S.1082-1084 (J. Kalbach). - Dt. Ausg. u.d.T.: Einführung in XML