Fig 1 - uploaded by Christian Bizer
Content may be subject to copyright.
The Semantic Web Publishing Vocabulary
Source publication
The Semantic Web consists of many RDF graphs nameable by URIs. This paper extends the syntax and semantics of RDF to cover such Named Graphs. This enables RDF statements that describe graphs, which is beneficial in many Semantic Web application areas. In this paper, we explore the application area of Semantic Web publishing: Named Graphs allow publ...
Similar publications
The semantic Web entails the standardization of represen-tation mechanisms so that the knowledge contained in a Web document can be retrieved and processed on a semantic level. RDF seems to be the emerging encoding scheme for that purpose. However, there are many different sorts of documents on the Web that do not use RDF as their pri-mary coding s...
This paper summarizes the steps that were followed in the creation of a dynamic webpage for publishing, in real time, the data from the Environmental Noise Monitoring station installed at the Association for the Development of Industrial Aerodynamics (ADAI), at the University of Coimbra. The webpage has been used as part of a remote laboratory acti...
SUMMARY This study aims at urban 3D features modeling/rendering system architecture design and its prototype implementations on 3D mobile and web 3D application. Mobile 3D is a cutting- edge technology. However, platforms and devices for mobile D GIS technology manipulating geographic data and information provide some limitations to design and impl...
As the demands of data and user tasks evolve and expand, the field of Information Visualization presents many challenges for designers and systems developers. Of primary concern is the mapping of data records and attributes to a visual presentation that enables the user to detect patterns and relationships within the data. The goal of this mapping...
Resumo. Os microformatos foram propostos com a finalidade de proporcionar semântica aos dados publicados na Web. Cerca de oito anos depois do seu surgimento e no aniversário de sete anos de fundação da comunidade Microformats.org, mantenedora do padrão, diversas aplicações foram e ainda são implementadas com vistas a fornecer semântica à internet,...
Citations
... This means that the quality metadata is stored and managed in a named graph that is separate from the dataset but can be embedded into the dataset if desired. Named graphs also allow the digital signing of graphs [8], thus ensuring trust in the computed metrics. ...
... Reusing the standardised Data Cube Vocabulary in daQ allows us to represent quality metadata of a dataset as a collection of Observation. This also permits applying the wide range of tools that support data cubes to quality metadata, including the CubeViz visualisation tool 8 . Figure 1 shows the current state of daQ, where the introduction of data cubes entails some structural changes over the initial version of the ontology from [11]. ...
Data quality is commonly defined as fitness for use. The problem of
identifying quality of data is faced by many data consumers. Data publishers
often do not have the means to identify quality problems in their data. To make
the task for both stakeholders easier, we have developed the Dataset Quality
Ontology (daQ). daQ is a core vocabulary for representing the results of
quality benchmarking of a linked dataset. It represents quality metadata as
multi-dimensional and statistical observations using the Data Cube vocabulary.
Quality metadata are organised as a self-contained graph, which can, e.g., be
embedded into linked open datasets. We discuss the design considerations, give
examples for extending daQ by custom quality metrics, and present use cases
such as analysing data versions, browsing datasets by quality, and link
identification. We finally discuss how data cube visualisation tools enable
data publishers and consumers to analyse better the quality of their data.
... • their use in the Semantic Web Publishing vocabulary [6] to allow named graphs to be digitally signed, thus ensuring trust in the computed metrics and defined named graph instance. Therefore, in principle each daq:QualityGraph can have the following triple :myQualityGraph swp:assertedBy :myWarrant . ...
Data quality is commonly defined as fitness for use. The problem of identifying the quality of data is faced by many data consumers. To make the task of finding good quality datasets more efficient, we introduce the Dataset Quality Ontology (daQ). The daQ is a lightweight , extensible vocabulary for attaching the results of quality benchmarking of a linked open dataset to that dataset. We discuss the design considerations, give examples for extending daQ by custom quality metrics, and present use cases such as browsing datasets by quality. We also discuss how tools can use the daQ to enable consumers find the right dataset for use. The Web of Data [Vocabularies, taxonomies and schemas for the web of data]
... The class Context is defined as a composition of Context Element, itself being formalized as a set of statements. The latter is defined as a subclass of a named RDF graph [12], to which a set of properties are added for time,loc,r,obs,src and trec: validityPeriod, hasLocation, reliability, originObservation, sourceCE and recordTime. The properties associated to Entity relatively to fundamental context dimensions allow expressing statements about an Entity or its Environment, regarding Environment, State, act:Activity, time:TemporalThing or loc:Location. ...
This chapter presents recent research results towards providing context-aware recommendations in the future internet, based on semantic modelling of knowledge and recommending approaches mixing both semantic and fuzzy processing for better personalisation. It focuses on an Hybrid Ad-hoc Network environment, constituting a common communication infrastructure today, where people share and manipulate multimedia content on both �fixed and mobile network nodes. Context-awareness in recommender systems is addressed together with the needs for semantics and fuzzy user preferences. A context-awareness platform based on the Content-Centric Network paradigm is presented, together with ontologies for context and situation. It feeds a knowledge-based context-aware recommender with contextual data. In the presented recommendation approach, Fuzzy theory is used in addition to semantic modelling and processing, to better represent user preferences in his interests and the weight of situation regarding these interests. An ontology for handling fuzzy properties is given as well as the extension of the semantic matchmaking that computes recommendation scores. Simulated as well as user-based experiment results are provided.
... Again, an additional attribute denoting the source document helps solving the problem [7]. The concept of named graphs [9] is including both issues. The main idea is that each document or ontology is modeled as a graph with a distinct name, mostly a URI. ...
Ontologies are often used to improve data access. For this purpose, existing data has to be linked to an ontology and appropriate
access mechanisms have to be provided. In this chapter, we review RDF storage and retrieval technologies as a common approach
for accessing ontology-based data. We discuss different storage models, typical functionalities of RDF middleware such as
data model support and reasoning capabilities and RDF query languages with a special focus on SPARQL as an emerging standard.
We also discuss some trends such as support for expressive ontology and rule languages.
... Pat Hayes' work was supported in part by the US Department of Defence under contract 2507-282- 22. Previous publications about this work include the paper at the WWW 2005 conference [20] which this paper extends, a paper at the Trust workshop at the International Semantic Web Conference 2004 [55], a paper on TriX at Extreme Markup 2004 [16], and various HP Labs Technical Reports [56,57]. Thanks to the anonymous reviewers of various earlier papers for their helpful feedback. ...
The Semantic Web consists of many RDF graphs nameable by URIs. This paper extends the syntax and semantics of RDF to cover such named graphs. This enables RDF statements that describe graphs, which is beneficial in many Semantic Web application areas. Named graphs are given an abstract syntax, a formal semantics, an XML syntax, and a syntax based on N3. SPARQL is a query language applicable to named graphs. A specific application area discussed in detail is that of describing provenance information. This paper provides a formally defined framework suited to being a foundation for the Semantic Web trust layer.
In this paper we discuss the role of the Nanopublication (nanopub) model for scholarly publications with particular focus on the citation of nanopubs.
There have been several ontologies developed for context-aware systems and frameworks based on semantic reasoning. In parallel, efforts have been made towards the realisation of ontologies for sensors and observations. While the main inputs of context-aware systems are observations provided by sensors, context ontologies focus only on expressing context data and do not consider the way and in which form this data is retrieved. In this paper, we review dedicated ontologies in the state of the art and bridge this gap by presenting a unifying generic context ontology centred on the concept of entity, together with an integrated sensor and observation ontology linking existing advanced ontologies.
