Data Cube Interface
This semantic web application facilitates the publishing and de-referencing of statistical linked data, utilizing the RDF Data Cube Vocabulary. It enables publishers to provide a user-friendly interface for observations, allowing other parties to easily browse and interact with the data. Key features include detailed observation requests, faceted search capabilities, and the ability to navigate across dimensions, making it a powerful tool for statistical data dissemination and exploration.
Data Cube Interface
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Presentation Transcript
Data Cube Interface Gofran Shukhair Email: firstname.lastname@deri.org
A semantic web application for publishing statistical linked data (expressed by RDF Data Cube Vocabulary).
Use Cases • For a publisher to enable de-referencing his/her data in a fine grained human-readable interface • It can be used by another party different from the publisher to browse the data
Features (1) • Requesting the application through this form of the url ./index.php?uri=<observation_uri>&endpoint=<endpoint_url>
Features (2) • Show the requested observation value and all the related information defined in the triple store behind the endpoint
Features (3) • Navigate between the related observation (by changing the value of any dimension/measure)
Features (4) • Book-markable urls for all the dataset components
Features (5) • TO DO...tag cloud showing values of each dimension corresponding the number of occurrence in the data set
Features (6) • Faceted search on data set by choosing the values of each dimension
Assuming .. • The data is expressed in RDF Data Cube Vocabulary (following the recommendations mentioned inhttp://publishing-statistical-data.googlecode.com/svn/trunk/specs/src/main/html/cube.html)
Assuming .. • The data cube vocabulary components should be expressed in the following way for the application: • Data Structure Definition • Dataset • Component Properties
Data Structure Definition • The order properties are optional • No preference on expressing a slice structure (what is important is using the data cube components properties as showed qb:dimension,qb:measure,qb:attribute) :dsd-co-slice a qb:DataStructureDefinition ; qb:component [qb:dimension :refArea; qb:order 1], [qb:dimension :refPeriod; qb:order 2; qb:componentAttachment qb:slice], [qb:dimension :instrument; qb:order 3; qb:componentAttachment qb:slice], [qb:dimension :crimeType; qb:order 4], [qb:measure :numberOfInstrumentOffences], [qb:measure :percentageOfInstrumentOffences], [qb:dimension qb:measureType], [qb:attribute sdmx-attribute:unitMeasure; qb:componentAttachment qb:DataSet]; qb:sliceStructure :sliceByRegionAndCrime
Dataset • The dataset instance should have the type qb:DataSet • The dataset instance should be annotated using rdfs:label, rdfs:comment • The dataset instance date, subject and publisher should be expressed using Dublin core (as recommended in the specification) • The publisher should be of a type org:Organization and/or foaf:Agent :crime_dataset a qb:DataSet; rdfs:label "Knife and sharp instrument offences"@en; rdfs:comment " recorded by the police for selected offences, 2008/091"@en; dcterms:date "2010-08-11"^^xsd:date; dcterms:subject "instrument offences"@en; dc:publisher :organization; qb:structure :dsd-co-slice ; sdmx-attribute:unitMeasure :offence; qb:slice :slice. :organization a org:Organization, foaf:Agent; rdfs:label "Epimorphics Ltd" .
Component Properties (Measure) • Annotated with rdfs:label , rdfs:comment :numberOfInstrumentOffences a rdf:Property, qb:MeasureProperty; rdfs:label "number Of Instrument Offences"@en; rdfs:subPropertyOf sdmx-measure:obsValue; rdfs:range xsd:decimal .
Component Properties (Dimension) • Annotated with rdfs:label , rdfs:comment • Codelists should be used (recommended) :refArea a rdf:Property, qb:DimensionProperty; rdfs:label "reference area"@en; rdfs:subPropertyOf sdmx-dimension:refArea; rdfs:range co-code:Area; qb:concept sdmx-concept:refArea .
Component Properties (Attribute) • Annotated with rdfs:label , rdfs:comment :offence a skos:Concept; skos:prefLabel "Offence"@en ; skos:notation "Offence" ; owl:sameAs <http://dbpedia.org/resource/criminal_offence>.
