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Simple SPARQL Tutorial 27/29: Understanding Named Graphs
Simple SPARQL Tutorial 27/29: Understanding Named Graphs
Published: 2014/03/03
Channel: Noureddin Sadawi
Simple SPARQL Tutorial 28/29: Querying Named Graphs - using NAMED GRAPH and GRAPH
Simple SPARQL Tutorial 28/29: Querying Named Graphs - using NAMED GRAPH and GRAPH
Published: 2014/03/03
Channel: Noureddin Sadawi
2015.03.25. Apache Jena Fuseki 2.0.0 - Named Graph
2015.03.25. Apache Jena Fuseki 2.0.0 - Named Graph
Published: 2015/03/25
Channel: Viet Hoang Le
Simple SPARQL Tutorial 29/29: More on Querying Named Graphs - Multiple NAMED GRAPHs
Simple SPARQL Tutorial 29/29: More on Querying Named Graphs - Multiple NAMED GRAPHs
Published: 2014/03/03
Channel: Noureddin Sadawi
2015.03.25. Apache Jena Fuseki 2.0.0 - Named Graph example
2015.03.25. Apache Jena Fuseki 2.0.0 - Named Graph example
Published: 2015/03/25
Channel: Viet Hoang Le
Gallery of named graphs
Gallery of named graphs
Published: 2016/01/22
Channel: WikiAudio
Virtuoso bug with named graphs
Virtuoso bug with named graphs
Published: 2016/02/23
Channel: Jirka Helmich
Network Theory: 11 Random & Distributed Graphs
Network Theory: 11 Random & Distributed Graphs
Published: 2015/04/26
Channel: Complexity Labs
Variation Graph in RDF and SPARQL for the GA4GH
Variation Graph in RDF and SPARQL for the GA4GH
Published: 2016/04/28
Channel: Jerven Bolleman
ACT: Science Graphs (No One Likes Reading!) + GIVEAWAY
ACT: Science Graphs (No One Likes Reading!) + GIVEAWAY
Published: 2015/11/19
Channel: Veritas Prep College
Use dynamic named ranges so your charts update automatically
Use dynamic named ranges so your charts update automatically
Published: 2015/05/26
Channel: BI Excel
Distributed Graph-based Entity Resolution Using Spark- Mahdi Namazifar (Cisco)
Distributed Graph-based Entity Resolution Using Spark- Mahdi Namazifar (Cisco)
Published: 2015/04/10
Channel: Spark Summit
Network Analysis tutorial: Types of Graphs
Network Analysis tutorial: Types of Graphs
Published: 2017/03/24
Channel: DataCamp
A Local Algorithm for Structure-Preserving Graph Cut
A Local Algorithm for Structure-Preserving Graph Cut
Published: 2017/07/04
Channel: KDD2017 video
What Is A Graph In Graph Theory?
What Is A Graph In Graph Theory?
Published: 2017/08/17
Channel: Oakley Oakley
Motion Graphics - Graph 5 ~ Named Wish
Motion Graphics - Graph 5 ~ Named Wish
Published: 2014/02/07
Channel: Fadhil Primadi
A Test-Bed for Generating Social Graphs and Recommending Named Groups from Email
A Test-Bed for Generating Social Graphs and Recommending Named Groups from Email
Published: 2015/07/12
Channel: Andrew Ghobrial
26. Creating an entity graph
26. Creating an entity graph
Published: 2014/10/07
Channel: 360 Knowledge Solutions
Trig graphs
Trig graphs
Published: 2017/04/25
Channel: Geoff Phillips
excel 2010 named ranges and graph
excel 2010 named ranges and graph
Published: 2013/03/15
Channel: R.N.A. Creation
SAS/GRAPH Tip: Controlling the Graph Axis
SAS/GRAPH Tip: Controlling the Graph Axis
Published: 2010/05/04
Channel: SAS Software
How to remove blank/ zero values from a graph in excel?
How to remove blank/ zero values from a graph in excel?
Published: 2017/03/08
Channel: Karina Adcock
KUMONOTE - a network/graph analysis software
KUMONOTE - a network/graph analysis software
Published: 2008/12/23
Channel: tkykhs
TUTORIAL -  How to use alcohol markers (Graph
TUTORIAL - How to use alcohol markers (Graph'it, Copic, tria etc.)
Published: 2015/04/26
Channel: Sakuems
How to download install and use graph
How to download install and use graph
Published: 2008/11/29
Channel: TI84tutorialz
What Is The Definition Of A Line Graph?
What Is The Definition Of A Line Graph?
Published: 2017/07/26
Channel: sri sparky
Little Fairy - Graph
Little Fairy - Graph'it Markers - Standard nib Drawing time lapse
Published: 2015/05/09
Channel: Sakuems
How to draw a flower in Graph
How to draw a flower in Graph
Published: 2008/11/29
Channel: TI84tutorialz
Market Today Software:. Graph:. DSE Listed Companies Graph
Market Today Software:. Graph:. DSE Listed Companies Graph
Published: 2013/10/20
Channel: Market Today
What Is A Line Graph?
What Is A Line Graph?
Published: 2017/07/26
Channel: sri sparky
The Power of Named Range: Creating Dynamic Graphs-Pt-004
The Power of Named Range: Creating Dynamic Graphs-Pt-004
Published: 2013/11/02
Channel: Syed Kollol
Deploy Knowledge Graphs into Virtuoso - PoolParty Tutorial #17
Deploy Knowledge Graphs into Virtuoso - PoolParty Tutorial #17
Published: 2013/04/26
Channel: PoolParty Semantic Suite
3ds Max - MCG - An introduction to Max Creation Graph
3ds Max - MCG - An introduction to Max Creation Graph
Published: 2015/04/17
Channel: Autodesk 3ds Max Learning Channel
The Power of Named Range: Creating Dynamic Graphs-Pt-002
The Power of Named Range: Creating Dynamic Graphs-Pt-002
Published: 2013/11/02
Channel: Syed Kollol
Moores Law - Transistor Graph
Moores Law - Transistor Graph
Published: 2011/10/13
Channel: Dan Hill
WebID+TLS+Delegation Demo: SPARQL Queries & ACLs
WebID+TLS+Delegation Demo: SPARQL Queries & ACLs
Published: 2016/07/07
Channel: Kingsley Idehen
Why Semantic Knowledge Graphs matter
Why Semantic Knowledge Graphs matter
Published: 2015/02/26
Channel: Helmut Blumauer
PoolParty Visual Mapper - RDF Visualization of Knowledge Graphs!
PoolParty Visual Mapper - RDF Visualization of Knowledge Graphs!
Published: 2015/11/30
Channel: PoolParty Semantic Suite
XLore: A Large Scale English-Chinese Bilingual Knowledge Graph
XLore: A Large Scale English-Chinese Bilingual Knowledge Graph
Published: 2013/08/27
Channel: Zhigang Wang
Flexibility of the Hamming graph(3,3)
Flexibility of the Hamming graph(3,3)
Published: 2017/06/05
Channel: Mike Winkler
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HOW TO CREATE DYNAMIC GRAPH IN EXCEL
Published: 2017/03/24
Channel: PK: An Excel Expert
Sedrick - Nano Beacon Graph
Sedrick - Nano Beacon Graph
Published: 2016/08/10
Channel: The Real Sedrick
The Power of Named Range: Creating Dynamic Graphs-Pt-001
The Power of Named Range: Creating Dynamic Graphs-Pt-001
Published: 2013/11/02
Channel: Syed Kollol
fuck graph
fuck graph
Published: 2009/09/22
Channel: bunnysaswine
Introduction to Pivot Tables, Charts, and Dashboards in Excel (Part 1)
Introduction to Pivot Tables, Charts, and Dashboards in Excel (Part 1)
Published: 2015/02/04
Channel: Excel Campus - Jon
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V 480 Click The below link In Description For Answers
Published: 2015/01/13
Channel: Jeffry Kelp
How to Use Graph Search on Facebook
How to Use Graph Search on Facebook
Published: 2014/03/15
Channel: jobs4mind.com - Work at Home Job Portal
Tamara - Graph
Tamara - Graph'it Markers - Brush nib Drawing time lapse
Published: 2015/05/09
Channel: Sakuems
TUTORIEL - Feutres à alcool (type graph
TUTORIEL - Feutres à alcool (type graph'it, copic) - PARTIE 2
Published: 2015/04/26
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Network analysis Vocabulary in Python - Graph Generator Introduction -   Tutorial 26
Network analysis Vocabulary in Python - Graph Generator Introduction - Tutorial 26
Published: 2017/09/12
Channel: TheEngineeringWorld
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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A named graph

Named graphs are a key concept of Semantic Web architecture in which a set of Resource Description Framework statements (a graph) are identified using a URI,[1] allowing descriptions to be made of that set of statements such as context, provenance information or other such metadata.

Named graphs are a simple extension of the RDF data model[2] through which graphs can be created but the model lacks an effective means of distinguishing between them once published on the Web at large.

Named graphs and HTTP[edit]

One conceptualization of the Web is as a graph of document nodes identified with URIs and connected by hyperlink arcs which are expressed within the HTML documents. By doing a HTTP GET on a URI (usually via a Web browser), a somehow-related document may be retrieved. This "follow your nose" approach also applies to RDF documents on the Web in the form of Linked Data, where typically an RDF syntax is used to express data as a series of statements, and URIs within the RDF point to other resources. This Web of data has been described by Tim Berners-Lee as the "Giant Global Graph".[3]

Describing a named graph

Named graphs are a formalization of the intuitive idea that the contents of an RDF document (a graph) on the Web can be considered to be named by the URI of the document. This considerably simplifies techniques for managing chains of provenance for pieces of data and enabling fine-grained access control to the source data. Additionally trust can be managed through the publisher applying a digital signature to the data in the named graph. (Support for these facilities was originally intended to come from RDF reification, however that approach proved problematic.[4])

Named graphs and RDF stores[edit]

While named graphs may appear on the Web as simple linked documents (i.e. Linked Data), they are also very useful for managing sets of RDF data within an RDF store. In particular, the scope of a SPARQL query may be limited to a specific set of named graphs.

Example[edit]

Assume the following (Turtle) RDF document has been placed in a SPARQL-capable store with the name http://example.org/joe.

@prefix foaf: <http://xmlns.com/foaf/0.1/> .

<http://example.org/joe#me> a foaf:Person .
<http://example.org/joe#me> foaf:homepage <http://example.org/joe/index.html> .
<http://example.org/joe#me> foaf:mbox <mailto:joe@example.org> .
<http://example.org/joe#me> foaf:name "Joe Lambda" .

This data has been written in a more verbose form than necessary to show the triple structures

The homepage of the person with the email address mailto:joe@example.org can be obtained using the SPARQL query:

PREFIX foaf: <http://xmlns.com/foaf/0.1/>

SELECT ?homepage

FROM NAMED <http://example.org/joe>

WHERE {
	GRAPH ?g {
		?person foaf:homepage ?homepage .
		?person foaf:mbox <mailto:joe@example.org> .
	}
}

The FROM NAMED here identifies the target graph for the query.

Named graphs and quads[edit]

Prior to the publication of the papers describing named graphs, there was considerable discussion about fulfilling their role within a store by using an arity above that of RDF triple statements: where triples have the form <subject> <predicate> <object>, quads would have a form along the lines of <subject> <predicate> <object> <context>. Named graphs can be represented this way, as <subject> <predicate> <object> <graphname>, with the advantage that the <graphname> part will be a URI, giving the quad Web-global scope compared to arbitrary local statement names. This way of representing quads resp. quad-statements was incorporated in the specification of N-Quads.[5]

Formal definition[edit]

A paper from the WWW 2005 conference by Carroll et al. includes a formal definition of named graphs.[6]

Specifications[edit]

There is currently no specification for named graphs in themselves beyond that described in Carroll et al. (2005)[6] and Carroll and Stickler (2004)[7] (which includes syntaxes for representing named graphs), but they do form part of the SPARQL Protocol and RDF Query Language specification.

Proposed specifications[edit]

See also[edit]

References[edit]

  1. ^ strictly speaking a URIRef
  2. ^ http://www.w3.org/TR/PR-rdf-syntax/ "Resource Description Framework (RDF) Model and Syntax Specification"
  3. ^ Giant Global Graph
  4. ^ Reification of RDF and N3)
  5. ^ https://www.w3.org/TR/n-quads/
  6. ^ a b [1]
  7. ^ TriX : RDF Triples in XML

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