How to Publish Linked Data on the Web
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- Lee Atkinson
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1 How to Publish Linked Data on the Web Tom Heath, Platform Division, Talis, UK Chris Bizer, FU Berlin, Germany Richard Cyganiak, DERI Galway, Ireland
2 Objectives Provide a broad understanding of the design decisions required when publishing Linked Data Introduce the principles and best practices that inform these decisions
3 Background
4 The RDF Data Model Triples subject predicate object <uri> typed-link <uri> or "literal" Mix schemas/vocabularies within one document Less painful data merging
5 Data Merging with RDF Prefixes rc: < rdf: < foaf: < dbpedia: < dp: < skos: <
6 What is Linked Data?
7 Why Publish Linked Data? Ease of Discovery Ease of Consumption Reduced Redundancy avoid duplication Added Value build ecosystems around your data/content
8 Scenario Online whisky shop: Wiskii.com New business venture, founded by Jeff For the whisky connoisseur Detailed background information from experts Contributions from customers Custom web app, relational backend Simultaneous publication in HTML and RDF
9 How to Publish Linked Data on the Web
10 5 Steps to Publishing Linked Data 1. Understand the Principles 2. Understand your Data 3. Choose URIs for Things in your Data 4. Setup Your Infrastructure 5. Link to other Data Sets
11 1. Understand the Principles
12 1. Linked Data Principles Use URIs as names for things anything, not just documents you are not your homepage information resources and non-information resources Use HTTP URIs globally unique names, distributed ownership allows people to look up those names Provide useful information in RDF when someone looks up a URI Include RDF links to other URIs to enable discovery of related information
13 2. Understand your Data
14 2. Understand Your Data What are the key things present in your data? People? Places? Books? Films? Musicians? Concepts? Photos? Comments? Reviews?...
15 2. Understand Your Data Things in the Wiskii.com database Distilleries Regions and Locations Founders Owners Brands Products Photos Reviews Comments Prices/Offers
16 2. Understand Your Data What vocabularies can be used to describe these? Principles Reuse, don't reinvent Mix liberally Potential Ontologies/Vocabularies Geo GoodRelations FOAF Review SIOC Whisky
17 3. Choose URIs for Things in Your Data
18 3. Choosing URIs: Principles Use HTTP URIs Keep out of other peoples' namespaces Abstract away from implementation details Hash or Slash
19 3. Choosing URIs: Common Patterns Thing RDF data HTML page Thing RDF data HTML page Thing RDF data HTML page Thing RDF data HTML page
20 3. Choosing URIs: Wiskii.com
21 3. Choosing URIs: Wiskii.com
22 4. Setup Your Infrastructure
23 4. Setup Your Infrastructure HTML RDF PHP DB
24 4. Setup Your Infrastructure HTML RDF PHP DB
25 4. Setup Your Infrastructure HTML RDF PHP DB
26 4. Setup Your Infrastructure HTTP GET HTML RDF PHP DB
27 4. Setup Your Infrastructure HTTP GET HTML RDF PHP DB
28 Content Negotiation
29 4. Setup Your Infrastructure HTTP GET HTTP 303 See Other HTTP 303 See Other HTML RDF PHP DB
30 4. Setup Your Infrastructure Rolling your own is not the only option See Linking Open Data area of the ESW Wiki kingopendata/publishingtools
31 5. Link to Other Data Sets
32 Other Available Data Sets
33 5. Link to other Data Sets Popular Predicates for Linking owl:sameas foaf:homepage foaf:topic foaf:based_near foaf:maker/foaf:made foaf:depiction foaf:page foaf:primarytopic rdfs:seealso
34 5. Link to other Data Sets DBpedia! brands distilleries Wikicompany regions Homepages Geonames FlickrWrappr
35 5. Link to other Data Sets Linking Algorithms String Matching e.g. Lexical Distance between labels Common Key Matching e.g. ISBN, Musicbrainz IDs Property-based Matching Do these two things have the same label, type and coordinates Aim for reciprocal links
36 Summary 1. Understand the Principles 2. Understand your Data 3. Choose URIs for Things in your Data 4. Setup Your Infrastructure 5. Link to other Data Sets
37 Questions?
38 More Information Contact Details tom.heath [at] talis.com chris [at] bizer.de richard.cyganiak [at] deri.org Slides Tutorial Photo Credit Gregory Todd Williams,
39
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