Search (15 results, page 1 of 1)

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Abstract

This document contains and presents test cases for the Web Ontology Language (OWL) approved by the Web Ontology Working Group. Many of the test cases illustrate the correct usage of the Web Ontology Language (OWL), and the formal meaning of its constructs. Other test cases illustrate the resolution of issues considered by the Working Group. Conformance for OWL documents and OWL document checkers is specified.

Date

14. 8.2011 13:33:22

Theme

Semantic Web

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Abstract

This document specifies usage scenarios, goals and requirements for a web ontology language. An ontology formally defines a common set of terms that are used to describe and represent a domain. Ontologies can be used by automated tools to power advanced services such as more accurate web search, intelligent software agents and knowledge management.

Theme

Semantic Web

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Abstract

The OWL 2 Web Ontology Language, informally OWL 2, is an ontology language for the Semantic Web with formally defined meaning. OWL 2 ontologies provide classes, properties, individuals, and data values and are stored as Semantic Web documents. OWL 2 ontologies can be used along with information written in RDF, and OWL 2 ontologies themselves are primarily exchanged as RDF documents. This document serves as an introduction to OWL 2 and the various other OWL 2 documents. It describes the syntaxes for OWL 2, the different kinds of semantics, the available profiles (sub-languages), and the relationship between OWL 1 and OWL 2.

Theme

Semantic Web

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Abstract

The Web Ontology Language OWL is a semantic markup language for publishing and sharing ontologies on the World Wide Web. OWL is developed as a vocabulary extension of RDF (the Resource Description Framework) and is derived from the DAML+OIL Web Ontology Language. This document contains a structured informal description of the full set of OWL language constructs and is meant to serve as a reference for OWL users who want to construct OWL ontologies.

Theme

Semantic Web

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Abstract

The World Wide Web as it is currently constituted resembles a poorly mapped geography. Our insight into the documents and capabilities available are based on keyword searches, abetted by clever use of document connectivity and usage patterns. The sheer mass of this data is unmanageable without powerful tool support. In order to map this terrain more precisely, computational agents require machine-readable descriptions of the content and capabilities of Web accessible resources. These descriptions must be in addition to the human-readable versions of that information. The OWL Web Ontology Language is intended to provide a language that can be used to describe the classes and relations between them that are inherent in Web documents and applications. This document demonstrates the use of the OWL language to - formalize a domain by defining classes and properties of those classes, - define individuals and assert properties about them, and - reason about these classes and individuals to the degree permitted by the formal semantics of the OWL language. The sections are organized to present an incremental definition of a set of classes, properties and individuals, beginning with the fundamentals and proceeding to more complex language components.

Theme

Semantic Web

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Abstract

Die OWL Web Ontology Language wurde entwickelt, um es Anwendungen zu ermöglichen den Inhalt von Informationen zu verarbeiten anstatt die Informationen dem Anwender nur zu präsentieren. OWL erleichtert durch zusätzliches Vokabular in Verbindung mit formaler Semantik stärkere Interpretationsmöglichkeiten von Web Inhalten als dies XML, RDF und RDFS ermöglichen. OWL besteht aus drei Untersprachen mit steigender Ausdrucksmächtigkeit: OWL Lite, OWL DL and OWL Full. Dieses Dokument wurde für Leser erstellt, die einen ersten Eindruck von den Möglichkeiten bekommen möchten, die OWL bietet. Es stellt eine Einführung in OWL anhand der Beschreibung der Merkmale der drei Untersprachen von OWL dar. Kenntnisse von RDF Schema sind hilfreich für das Verständnis, aber nicht unbedingt erforderlich. Nach der Lektüre dieses Dokuments können sich interessierte Leser für detailliertere Beschreibungen und ausführliche Beispiele der Merkmale von OWL dem OWL Guide zuwenden. Die normative formale Definition von OWL findet sich unter OWL Semantics and Abstract Syntax.

Theme

Semantic Web

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Abstract

The OWL Web Ontology Language is designed for use by applications that need to process the content of information instead of just presenting information to humans. OWL facilitates greater machine interpretability of Web content than that supported by XML, RDF, and RDF Schema (RDF-S) by providing additional vocabulary along with a formal semantics. OWL has three increasingly-expressive sublanguages: OWL Lite, OWL DL, and OWL Full. This document is written for readers who want a first impression of the capabilities of OWL. It provides an introduction to OWL by informally describing the features of each of the sublanguages of OWL. Some knowledge of RDF Schema is useful for understanding this document, but not essential. After this document, interested readers may turn to the OWL Guide for more detailed descriptions and extensive examples on the features of OWL. The normative formal definition of OWL can be found in the OWL Semantics and Abstract Syntax.

Theme

Semantic Web

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Abstract

This description of OWL, the Web Ontology Language being designed by the W3C Web Ontology Working Group, contains a high-level abstract syntax for both OWL DL and OWL Lite, sublanguages of OWL. A model-theoretic semantics is given to provide a formal meaning for OWL ontologies written in this abstract syntax. A model-theoretic semantics in the form of an extension to the RDF semantics is also given to provide a formal meaning for OWL ontologies as RDF graphs (OWL Full). A mapping from the abstract syntax to RDF graphs is given and the two model theories are shown to have the same consequences on OWL ontologies that can be written in the abstract syntax.

Theme

Semantic Web

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Theme

Semantic Web

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Abstract

RDF - the Resource Description Framework - is a foundation for processing metadata; it provides interoperability between applications that exchange machine-understandable information on the Web. RDF emphasizes facilities to enable automated processing of Web resources. RDF metadata can be used in a variety of application areas; for example: in resource discovery to provide better search engine capabilities; in cataloging for describing the content and content relationships available at a particular Web site, page, or digital library; by intelligent software agents to facilitate knowledge sharing and exchange; in content rating; in describing collections of pages that represent a single logical "document"; for describing intellectual property rights of Web pages, and in many others. RDF with digital signatures will be key to building the "Web of Trust" for electronic commerce, collaboration, and other applications. Metadata is "data about data" or specifically in the context of RDF "data describing web resources." The distinction between "data" and "metadata" is not an absolute one; it is a distinction created primarily by a particular application. Many times the same resource will be interpreted in both ways simultaneously. RDF encourages this view by using XML as the encoding syntax for the metadata. The resources being described by RDF are, in general, anything that can be named via a URI. The broad goal of RDF is to define a mechanism for describing resources that makes no assumptions about a particular application domain, nor defines the semantics of any application domain. The definition of the mechanism should be domain neutral, yet the mechanism should be suitable for describing information about any domain. This document introduces a model for representing RDF metadata and one syntax for expressing and transporting this metadata in a manner that maximizes the interoperability of independently developed web servers and clients. The syntax described in this document is best considered as a "serialization syntax" for the underlying RDF representation model. The serialization syntax is XML, XML being the W3C's work-in-progress to define a richer Web syntax for a variety of applications. RDF and XML are complementary; there will be alternate ways to represent the same RDF data model, some more suitable for direct human authoring. Future work may lead to including such alternatives in this document.

Theme

Semantic Web

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Footnote

Rez. in: Knowledge organization 22(1995) no.3/4, S.180-181 (M. Hudon)

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Abstract

This specification provides a model and grammar for representing the structure of information resources used to define topics, and the associations (relationships) between topics. Names, resources, and relationships are said to be characteristics of abstract subjects, which are called topics. Topics have their characteristics within scopes: i.e. the limited contexts within which the names and resources are regarded as their name, resource, and relationship characteristics. One or more interrelated documents employing this grammar is called a topic map.TopicMaps.Org is an independent consortium of parties developing the applicability of the topic map paradigm [ISO13250] to the World Wide Web by leveraging the XML family of specifications. This specification describes version 1.0 of XML Topic Maps (XTM) 1.0 [XTM], an abstract model and XML grammar for interchanging Web-based topic maps, written by the members of the TopicMaps.Org Authoring Group. More information on XTM and TopicMaps.Org is available at http://www.topicmaps.org/about.html. All versions of the XTM Specification are permanently licensed to the public, as provided by the Charter of TopicMaps.Org.

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Abstract

SKOS (Simple Knowledge Organisation System) provides a model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, folksonomies, and other types of controlled vocabulary. As an application of the Resource Description Framework (RDF) SKOS allows concepts to be documented, linked and merged with other data, while still being composed, integrated and published on the World Wide Web. This document is an implementors guide for those who would like to represent their concept scheme using SKOS. In basic SKOS, conceptual resources (concepts) can be identified using URIs, labelled with strings in one or more natural languages, documented with various types of notes, semantically related to each other in informal hierarchies and association networks, and aggregated into distinct concept schemes. In advanced SKOS, conceptual resources can be mapped to conceptual resources in other schemes and grouped into labelled or ordered collections. Concept labels can also be related to each other. Finally, the SKOS vocabulary itself can be extended to suit the needs of particular communities of practice.

Theme

Semantic Web

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Abstract

SKOS Core provides a model for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, 'folksonomies', other types of controlled vocabulary, and also concept schemes embedded in glossaries and terminologies. The SKOS Core Vocabulary is an application of the Resource Description Framework (RDF), that can be used to express a concept scheme as an RDF graph. Using RDF allows data to be linked to and/or merged with other data, enabling data sources to be distributed across the web, but still be meaningfully composed and integrated. This document is a guide using the SKOS Core Vocabulary, for readers who already have a basic understanding of RDF concepts. This edition of the SKOS Core Guide [SKOS Core Guide] is a W3C Public Working Draft. It is the authoritative guide to recommended usage of the SKOS Core Vocabulary at the time of publication.

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Abstract

Am Anfang war das Wort. Sehr viel später erfand ein gewisser Herr Gutenberg ein Handgießinstrument zur Herstellung von Drucktypen. Und was sich daraus entwickelte, ist bekannt: Die moderne Informations- und Kommunikationsgesellschaft, deren Dynamik nicht zuletzt von der Effektivität der Daten-, Dokumenten- und Schriftgutverwaltung abhängt. Beim DIN-Taschenbuch 343 Bibliotheks- und Dokumentationswesen handelt es sich um ein Normenkompendium, das genau diese Verfahren aufgreift: Es stellt der interessierten Fachöffentlichkeit insgesamt 22 nationale und internationale Normen der Bereiche "Gestaltung und Erschließung von Dokumenten", "Bibliotheksmanagement", "Codierungs- und Nummerungssysteme" sowie "Bestandserhaltung in Archiven und Bibliotheken" vor. Die Auswahl der Normen verdeutlicht zweierlei: Zum einen den Einfluss der sich ständig weiterentwickelnden und dabei konvergierenden Technologien, der u.a. das Publizieren und die Datenrecherche beeinflusst. Zum zweiten die Notwendigkeit, neue Anforderungen zu berücksichtigen, die sich aus dem stetig zunehmenden internationalen Datenaustausch ergeben. Das DIN-Taschenbuch verschafft einen genauen Überblick über den Zusammenhang zwischen einschlägigen DIN- und ISO-Normen und klärt über Namencodes von Ländern und deren Untereinheiten auf (DIN ISO 3166-2:2001). Komplettiert wird das Werk durch den vollständigen Abdruck des DINFachberichts 13 "Bau- und Nutzungplanung von wissenschaftlichen Bibliotheken". Dort werden Bibliotheken als Servicezentren verstanden, die zunehmend digitalisierte Informationsquellen bereit stellen.

Content

Enthält 22 vollständig abgedruckte nationale und internationale Normen für die Bereiche Archiv-, Bibliotheks-, Dokumentations-, Museums- und Verlagswesen

Footnote

Rez. in: ABI-Technik 21(2002) H.3, S.294-295 (K. Weishaupt); "Im Deutschen Institut für Normung ist der Normenausschuss Bibliotheks- und Dokumentationswesen (NABD) verantwortlich für die nationale Normung für das Erstellen, Publizieren, Erschließen, Erhalten, Wiederauffinden, Vermitteln und die Nutzung von Dokumenten, Daten und Schriftgut für die Bereiche Archiv-, Bibliotheks, Dokumentations-, Museumsund Verlagswesen. Mit dem neuen DIN-Taschenbuch will er einen Überblick über die DIN-Normen geben, die in den letzten Jahren auf internationaler Ebene unter aktiver deutscher Mitarbeit veröffentlicht, dann als DIN-Normen übernommen worden sind und die den veränderten Anforderungen der Informations- und Kommunikationsgesellschaft Rechnung tragen - so die eigenen Angaben des Ausschusses im Vorwort (S. XI). Vor dem Hintergrund dieses recht offen formulierten Anspruches kommt es zu einer Zusammenstellung von 22 Normen, die auf den ersten Blick recht bunt gemischt wirkt: Abgedruckt sind Normen zur Erstellung und Weiterentwicklung von Thesauri, zu Titelangaben von Dokumenten, Kürzungs- und Transliterationsregeln, Sortierregeln, Abschnittsnummerierungen, Ländernamen, zur ISBN, ISSN sowie den Standardnummern ISMN und ISWC für Musikalien, zu Leistungsindikatoren für Bibliotheken und zu Lebensdauer-Klassen von Papier und Karton, Anforderungen an die Aufbewahrung von Archiv- und Bibliotheksgut und zur Alterungsbeständigkeit von Schriften. Der DIN-Fachbericht "Bau- und Nutzungsplanung von wissenschaftlichen Bibliotheken" rundet das Werk ab. Negativ ausgedrückt: Es wird niemanden geben, der für seinen beruflichen Alltag all diese Normen benötigt. Die positive Sicht: Das DIN-Taschenbuch deckt so viele Themen ab, dass der Kreis der Interessierten recht groß sein dürfte. Auf alle Fälle ist beeindruckend, zu wie vielen Themen aus den Bereich des Bibliotheks- und Dokumentationswesens es Normen gibt; vermutlich ist deren Existenz nicht einmal der Fachöffentlichkeit in vollem Umfang bekannt. Ein solches Beispiel ist DIN 1505, Teil 2: "Titelangaben von Dokumenten: Zitierregeln"; diese Norm wendet sich "an Autoren, Verleger und Redakteure und soll für Literaturzusammenstellungen, für Literaturverzeichnisse am Ende einer Schrift bzw. eines Beitrags, im Kontext oder in Fußnoten benutzt werden" (S. 38). Damit ist sie praktisch für alle relevant, die wissenschaftlich arbeiten und Texte schreiben - aber kaum jemand kennt diese Norm! Viele Zeitschriften und Fachgesellschaften haben ihre eigenen Regeln, nach denen zitiert werden soll. Im Institut Arbeit und Technik in Gelsenkirchen ist vor einigen Jahren mit Förderung der Deutschen Forschungsgemeinschaft die Software LibLink entwickelt worden, mit der aus MAB-Daten, die aus einem Bibliothekskatalog exportiert worden waren, automatisiert Literaturverzeichnisse für wissenschaftliche Texte erstellt werden sollten.