What is an RDF dataset?

An RDF dataset is defined as a collection of RDF graphs where all but one are named graphs associated with an IRI or blank node (the graph name), and the unnamed default graph [ RDF11-CONCEPTS ].

What is an RDF document?

The Resource Description Framework (RDF) is a general framework for representing interconnected data on the web. RDF statements are used for describing and exchanging metadata, which enables standardized exchange of data based on relationships. RDF is used to integrate data from multiple sources.

What is the result type of an Sparql ask query?

SPARQL also supports extensible value testing and constraining queries by source RDF graph. The results of SPARQL queries can be results sets or RDF graphs.

What is an RDF server?

The Resource Description Framework (RDF) is a family of W3 specifications that you can use as a standard data interchange framework for modeling information. Applications can store and query RDF data in IBM® Db2® Version 11.1 Enterprise Server Edition (Db2 Enterprise Server Edition) databases.

Why is RDF used?

RDF enables effective data integration from multiple sources, detaching data from its schema. This allows multiple schemas to be applied, interlinked, queried as one and modified without changing the data instances.

What is RDF example?

One of the first RDF vocabularies used worldwide was the “Friend of a Friend” (FOAF) vocabulary for describing social networks. Other examples of RDF vocabularies are: Dublin Core. The Dublin Core Metadata Initiative maintains a metadata element set for describing a wide range of resources.

How the Web data is represented in RDF?

RDF (Resource Description Framework) is one of the three foundational Semantic Web technologies, the other two being SPARQL and OWL. In particular, RDF is the data model of the Semantic Web. That means that all data in Semantic Web technologies is represented as RDF. If you store Semantic Web data, it’s in RDF.

Is RDF a language?

An RDF query language is a computer language, specifically a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework (RDF) format. SPARQL has emerged as the standard RDF query language, and in 2008 became a W3C recommendation.

Where is SPARQL used?

SPARQL can be used to express queries across diverse data sources, whether the data is stored natively as RDF or viewed as RDF via middleware. SPARQL contains capabilities for querying required and optional graph patterns along with their conjunctions and disjunctions.

Is RDF an ontology?

RDF Schema (RDFS) is a language for writing ontologies. An ontology is a model of (a relevant part of) the world, listing the types of object, the relationships that connect them, and constraints on the ways that objects and relationships can be combined.

Is RDF still used?

Although the RDF/XML format is still in use, other RDF serializations are now preferred by many RDF users, both because they are more human-friendly, and because some RDF graphs are not representable in RDF/XML due to restrictions on the syntax of XML QNames.

What are the basic elements of RDF?

The main elements of RDF are the root element, , and the element, which identifies a resource.

What is the use of RDF in database?

RDF is a standard model for data interchange on the Web. RDF has features that facilitate data merging even if the underlying schemas differ, and it specifically supports the evolution of schemas over time without requiring all the data consumers to be changed. RDF extends the linking structure of the Web to use URIs to name

What is the RDF 1 specification?

The RDF 1.1 specification consists of a suite of W3C Recommendations and Working Group Notes, published in 2014. This suite also includes an RDF Primer. See also Tim Berners-Lee’s writings on Web Design Issues, including Metadata Architecture.

What is the easiest way to understand RDF?

This graph view is the easiest possible mental model for RDF and is often used in easy-to-understand visual explanations. The RDF 1.1 specification consists of a suite of W3C Recommendations and Working Group Notes, published in 2014. This suite also includes an RDF Primer.

What is a linking structure in RDF?

This linking structure forms a directed, labeled graph, where the edges represent the named link between two resources, represented by the graph nodes. This graph view is the easiest possible mental model for RDF and is often used in easy-to-understand visual explanations.