Linked data introduction w exempel

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Linked data introduction w exempel

  1. 1. Linked DataIntroduction“I’m encouraged by what actually can be done to improvethe research and commercial utility of information.”Here’s an intro to why …Kerstin ForsbergAstraZeneca R&D, Sweden
  2. 2. Web of Documents Web 3.0 Web of (Linked) Data An Intro To The Semantic Web: Why You Need To Know About It Sooner Than Later , by Samantha Wong Image Source: Frederic Martin Linked Data Introduction2
  3. 3. Linking Open Data (LOD) cloudTwo Forerunners: UK and US Government http://data.gov/ http://data.gov.uk/ The Linking Open Data Linked Data Introduction cloud diagram3
  4. 4. Linking Open Data (LOD) cloudLinked Data ClinicalTrial.gov Global Identifier (URI) for a AZ study http://data.linkedct.org/resource/trial/NCT00755378 48 RDF Triples Linked Data Introduction4
  5. 5. 4 Principles for Linked Data …… and 5 stars for Linked Open Data 1. Use URIs (Uniform Resource Identifiers) as names for things. 2. Use HTTP URIs so that people can look up (dereference) those names. 3. When someone looks up a URI, provide useful information. 4. Include links to other URIs so that they can discover more things. Source: Linked Open Data star scheme by example More resources introducing and describing the Linked Data idea Linked Data Introduction5
  6. 6. Linked Enterprise Data Source: What does Open Data mean for Enterprises? More resources introducing and describing the Linked Data idea Linked Data Introduction6
  7. 7. “Linked R&D Data”Examples of Building Blocks • Global identifier (URI) scheme for AZ entities (e.g. people, projects, studies, drugs) • Recommended biomedical ontologies and basic vocabularies to provide context (semantic and provenance) to data • Dataset Catalogue From the AZ RDI report: “Persistent URIs and Linked Data “ ordered by Mike Westaway Linked Data Introduction7
  8. 8. I’m encouraged by …• … what actually can be done by applying Linked Data principles, together with a stepwise implementation and pragmatic application of crucial building blocks, to … Health Care and Life Sciences (HCLS) Interest Group Linking Open Drug Data• … improve the research and commercial utility of information • Organized for associations • Prepared for not yet defined use EU project The Large Knowledge Collider Linked Life Data • Ready for automation where computers A 2-page summary of our learnings from can function alongside us to participating in these external projects: • Mitigate the complexity in discovering, Linked Data in Pharma, 2011, Bo Andersson and Kerstin Forsberg accessing, connecting and interpreting information • Improve the productivity in managing information Linked Data Introduction8
  9. 9. Extras• One example - Spending Data in UK• Two things to remember - RDF Triples - Global Identifiers (URIs)• Scenarios • Linked Clinical Study Metadata • Linked Patient Data in a Clinical Study Linked Data Introduction (Extras)9
  10. 10. One example Spending Data in UK From the Linking Open Data cloud A Payment from Lichfield District Council, one local authority in the UK. Globally identified by a URI http://spending.lichfielddc.gov.uk/spend/8605670 Linked Data Introduction (Extras) Linked Spending Data –10 How and Why Bother Kerstin Forsberg CDISC Interchange Europe 2011 eHR and the World Beyond
  11. 11. Two things to rememberRDF Triples Resource Description subject predicat object Framework Example from a text book The sky has the color blue Example from the Spending data example in UK Payment number 8605670 Net Amount 120.00 Payment number 8605670 Type Expenditure Line Payment number 8605670 Payer Lichfield District Council Lichfield District Council Type Local Authority Triples for the standards that provides the semantics The property Net Amount comment “The net amount of the payment. This is the effective cost to the payer after any reclaimable tax has been deducted.” The class Expenditure Line subclass of Observation in a multi-dimensional Linked Data Introduction (Extras) data cube for statistics11
  12. 12. Two things to rememberGlobal Identifiers Uniform Resource Identifier URI Examples of Identifiers for “things” in Spending data example http://spending.lichfielddc.gov.uk/spend/8605670 http://statistics.data.gov.uk/id/local-authority/41UD Examples of Identifiers for “types of things” / “standards for things” http://statistics.data.gov.uk/def/administrative-geography/LocalAuthority http://reference.data.gov.uk/def/payment#ExpenditureLine http://reference.data.gov.uk/def/payment#netAmount http://purl.org/linked-data/cube#Observation Linked Data Introduction (Extras)12
  13. 13. One example – “under the hood” Live view using the Web Data Inspector 2 of 10 RDF Triples Linked Data Introduction (Extras)13 Kerstin Forsberg CDISC Interchange Europe 2011 eHR and the World Beyond
  14. 14. One example – with a top-down approach to standardization of the semantics The Payment Ontology Live view using the Web Data Inspector Linked Data Introduction (Extras)14 Kerstin Forsberg CDISC Interchange Europe 2011 eHR and the World Beyond
  15. 15. UK government: Top-down approach to standardization for Spending Data Statistical Data perspective Linked Data Cube Vocabulary Presentation: Statistical Data in RDF The RDF Data Cube vocabulary Payment Ontology Guide to the Payments Ontology Linked Data Introduction (Extras)15 Kerstin Forsberg CDISC Interchange Europe 2011 eHR and the World Beyond
  16. 16. Scenario: Linked Clinical Study Metadata http://clinical.reference.astrazenenca.com/DI/SIZE#LARGE Internal categorization to http://reference.cdisc.org/ct/sdtm/TSPARAMCD#ROUTE support Design & Interpretation decisionshttp://clinial.data.astrazeneca.com/id/study/D8180C00011 owl:sameAs http://data.linkedct.org/resource/trial/NCT00755378 What would we like to What would we like internal the see on a to see as linked data description of it? webpage presenting linked data describing a clinical study?16 Linked Data Introduction (Extras) Kerstin Forsberg CDISC Interchange Europe 2011 eHR and the World Beyond
  17. 17. ScenarioLinked Patient Data in a Clinical Study• If each AZ clinical study had a global identifier/URI (could be something like this http://data.astrazenenca.com/id/clinicalstudy/D8180C00011/ similar to what exist already today for studies in ClinicalTrial.gov e.g. http://data.linkedct.org/resource/trial/NCT00755378• If each identified Observation in a clinical study dataset delivered to AZ had a global identifier, e.g. http://data.astrazenenca.com/data/observation/D8180C00011/20000034• If each individual Observation via a RDF triple linked to its global identified test procedure, similar to what exists today for CDISC’s SDTM submission values e.g. hemoglobin measurement http://linkedlifedata.com/resource/umls/id/C051801• If each individual Observation via a RDF triple linked to contextual information, similar to what exists today for CDISC’s SDTM submission values for e.g. http://linkedlifedata.com/resource/umls/id/C0038846 - prefLabel ‘Supine Position’. (Hopefully, CDISC, together with NCI, will in the future publish their standards in a similar way to make it easier to link clinical data.)• If each identified Observation also was delivered with its provenance information, for example two RDF triples expressing references to the identified measurement device and to the SOP document being used. For more details see the provenance vocabulary http://trdf.sourceforge.net/provenance/ns.htm17 Linked Data Introduction (Extras)

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