advertisement

Demo: Profiling & Exploration of Linked Open Data

50 %
50 %
advertisement
Information about Demo: Profiling & Exploration of Linked Open Data
Technology

Published on March 12, 2014

Author: stefandietze

Source: slideshare.net

Description

Talk at Open Data Seminar in St Petersburg, March 2014
advertisement

Motivation Data on the Web Some eyecatching opener illustrating growth and or diversity of web data Profiling & Exploration of Linked Datasets Stefan Dietze, Besnik Fetahu, Davide Taibi L3S Research Center, DE, @stefandietze, http://purl.org/dietze Stefan Dietze 12/03/14

Data curation and dataset profiling LinkedUp Dataset Catalog Stefan Dietze 12/03/14  Catalog of data (LinkedUp Catalog): classification of datasets according to resource types, disciplines/topics, data quality, accessability, etc  Infrastructure for distributed/federated querying describes  Which datasets are useful & trustworthy for case XY (eg „learning about the solar system“) ?  Which topics (eg „Astronomy“) are covered by dataset X?  Which datasets offer videos (slides, publications, statistics etc)?

LinkedUp Data Catalog in a nutshell http://datahub.io/group/linked-education http://data.linkededucation.org/linkedup/catalog/  RDF (VoID) dataset catalog: browse & query distributed datasets  Live information about endpoint accessibility  Federated queries using type mappings Stefan Dietze 12/03/14

db:Astro. Objects Extracting Topic Profiles of Linked Datasets Dataset Metadata Stefan Dietze 12/03/14 Schema mappings BIBO AAISO FOAF contains Entity disambiguation Topic profile extraction db:Astronomy db:Astro. Objects LinkedUp Dataset Catalog yov:Video po:Programme BBC Programme <po:Programme …> <po:Series>Wonders of the Solar System</.> <po:Actor>Brian Cox</…> </po:Programme…> <yo:Video …> <dc:title>Pluto & the Dwarf Planets</dc:title> … </yo:Video…> Yovisto Video bibo:Fil bibo:Fi bibo:Film

What’s all the data about: exploring topics of LOD in a nutshell http://data-observatory.org/lod-profiles/ Stefan Dietze 12/03/14  Visualisation & exploration of dataset-topic-graph (datasets, topics, relationships)  Includes all responsive datasets of LOD Cloud A Scalable Approach for Efficiently Generating Structured Dataset Topic Profiles, Fetahu, B., Dietze, S., Nunes, B.P., Cassanova M., Nejdl, W. (2014), 11th Extended Semantic Web Conference, ESWC2014, Greece, May 2014.

Stefan Dietze 12/03/14 dbp:Category:Royal_Medal_winners dbp:Category:1955_births dbp:Category:People_from_London dbp:Category:Buzzwords dbp:Category:Web_Services dbp:Category:HTTP dbp:Category:Unitarian_Universalists dbp:Category:World_Wide_Web What have these categories in common?

Stefan Dietze 12/03/14 Diversity of category profile for a single paper Berners-Lee, Tim; Hendler, James, Ora Lassila (2001). "The Semantic Web". Scientific American Magazine. person document dbp:Tim_Berners-Lee dbp:Category:1955_births dbp:Category:People_from_London dbp:Category:Buzzwords dbp:Semantic_Web dbp:Category:Semantic_Web dbp:Category:Web_Services dbp:Category:HTTP dbp:Category:Unitarian_Universalists first-level categories (dcterms:subject) dbp:Category:World_Wide_Web dbp:Category:Royal_Medal_winners

 DBpedia category graph not an ideal “topic” vocabulary:  Broad and noisy  “Categories” vs “topics” (for capturing disciplines, thesauri like UNESCO Thesaurus seem better suited)  Lack of clear hierarchy: graph, not a tree  Mixing categories across resource types (document, person etc) creates “perceived noise”  But: broadness is useful as general vocabulary for categorisation of all sorts of resource types Stefan Dietze 12/03/14 Dataset profiling: some lessons learned

Stefan Dietze 12/03/14 http://data-observatory.org/led-explorer/  Type specific views on datasets/ categories (ie “topics”)  “Document” (foaf:document)  “Person “ (foaf:person)  “Course” (aaiso:course)  Currently applied to datasets in LinkedUp Catalog only (as schema mappings already available here) More precise profiles of educational datasets

Thank you! 12/03/14 10Stefan Dietze http://data-observatory.org/led-explorer/ http://data-observatory.org/lod-profiles/

Add a comment

Related presentations

Presentación que realice en el Evento Nacional de Gobierno Abierto, realizado los ...

In this presentation we will describe our experience developing with a highly dyna...

Presentation to the LITA Forum 7th November 2014 Albuquerque, NM

Un recorrido por los cambios que nos generará el wearabletech en el futuro

Um paralelo entre as novidades & mercado em Wearable Computing e Tecnologias Assis...

Microsoft finally joins the smartwatch and fitness tracker game by introducing the...

Related pages

Demo: Profiling & Exploration of Linked Open Data - Technology

Demo: Profiling & Exploration of Linked Open Data Jan ... illustrating growth and or diversity of web data Profiling & Exploration of Linked Datasets ...
Read more

Demo: Profiling & Exploration of Linked Open Data - HubSlide

Transcripts - Demo: Profiling & Exploration of Linked Open Data. 1. Motivation Data on the Web Some eyecatching opener illustrating growth and or diversity ...
Read more

Profiling linked open data with ProLOD (PDF Download ...

Profiling Linked Open Data with ... I. PROFILING LINKED OPEN DATA Data profiling comprises a well ... of the Int. Conf. on Data Engineering (ICDE) Demo, ...
Read more

Presentations | LinkedUp: Linking Web Data for Education ...

Open Data in Education Seminar, ... Presentations given at the Open Data in Education ... Demo: Profiling & Exploration of Linked Open Data from Stefan ...
Read more

Lasso contextualized semantic linked open data cloud demo ...

LASSOContextualizedSemanticLinked Open Data Cloud Demo Lookup & Alignment Service with Semantic Open Data ... Demo: Profiling & Exploration of Linked Open ...
Read more

Profiling and mining RDF data with ProLOD++ - ResearchGate

Profiling and Mining RDF Data with ... I. PROFILING LINKED OPEN DATA ... exploration and reuse as well as helping data portal administrators in ...
Read more

Open Data in Education (Открытые данные в образовании ...

This was the question explored at the Open Data in Education Seminar held in St Petersburg, ... exploration and ... to Teach Linked Open Data to ...
Read more

Toni Gruetze - Hasso Plattner Institute

... data profiling, ... Toni Gruetze; Hazar Harmouch; Maximilian Jenders; Anja Jentzsch; Ioannis Koumarelas; Sebastian Kruse; ... Open positions;
Read more