How To Create A Web Of Knowledge From Data And Content In A Web Browser (Web)
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1 Semantic Technologies: Linked Data and OER Opening and linking the data and content silos, to leverage the knowledge capital represented by our OER repositories Edmundo Tovar (UPM ) Nelson Piedra (UTPL, Jorge López UTPL, Janneth Chicaiza UTPL, Oscar Martínez UMH 2012 World Open Educational Resources Congress Wednesday 20 Friday 22 June, 2012 Room XII, UNESCO HQ, Paris, France this work is licensed under a Creative Commons Atribución-NoComercial-SinDerivadas 3.0 Ecuador License #WorldOER #OpenEducationalResources #OpenCourseWare #linkeddata #ocw #oer #SemWeb #SemanticWeb #LOCWD #LOD
2 2 I. OER/OCW worldwide repositories a pot a gold In OER and OCW scope: Open license is Not Enough! A challenge to those involved in providing OER/OCW is establish ways where they can be most esasily found to use, reuse, sharing and remix. Our OER semantic vision: Educational Content + Open Licenses + Data in Machine Format
3 WHY OCW/OER + LINKED DATA? In order to move forward and realize the promise of Linked Data for OCW/OER Repositories, Universities The Linked Data aid the discovery, reliable re-use of data, provide improved provenance and facilitate automated processing by increased flexibility to changes in presentation, use, reuse, remix and reduced ambiguity.
4 Linked Data is a question of Open access for course, resources and materials Legal compatibility of distributed educational resources silos Improvement interoperability and accessibility of educational content Best practices: For identifiers (http and uris) For modelling data (RDF) For vocabularies and ontologies (RDFS, OWL) For connect and querying (SPARQL)
5 II. How find OpenCourseWare? Searches based on Google Search Engine; Categories and tags. In sum, the OCW searches have the following problems: * The query returns few relevant results compared with the number of retrieved irrelevant results. * Results are unsatisfactory because the search engine compares words and does not take into account the semantics of a term. * Results are simple, that is, do not combine retrieved results that are stored at different Websites. * The user has to extract the data and information from the located pages containing relevant results, because information is not available to machine agents in a machine-processable format.
6 6.613 OCW 65 institutions 12 languages [Dic 2011] Search Courses: Advanced Course Search Browse by Language Browse by Source OpenCourseWare Websites Course Catalog (BETA) associated universities, 23 Iberoamerican countries. 14M of teachers and students 1582 OCW couses 41 OCW providers 5 languages Accces by: Knowledge areas Authores Keywords Universities
7 II The Value of the Semantic Web in Open Academic Initiatives Education empowered by Semantic Web Semantic Web technologies can also help to integrate the work of disperse institutions producing diverse data. The Linked Data aid the discovery, reliable re-use of data, provide improved provenance and facilitate automated processing by increased flexibility to changes in presentation and reduced ambiguity.
8 Challenges on management of OCW information generated and shared by Organizations (1) Large amounts of unstructured, and semistructured data. (2) Although the collected data from OCW repositories may have certain structure accepted by community, but not all data have an similar or compatible structure and meaning. (3) Open education materiales are shared as Information Silos or "Walled Gardens"
9 III. USING LINKED DATA ON OCW from Web of Documents to Web of Data from human to human Discovery, Access, and Usages of Resources in the Web
10 General Framework for Publishing Open Educational Contents as Linked Data
11 Cycle to OCW to RDF Publication Monitoring for new OCW organizations and courses Enrichment Linked OCW Data Repository stream of html content Agent to include new OCW Organizations OCW Directories Listener Agent to include new OCW from universities OCW Repositories Listener A new OCW organization A new OCW Linked OpenCourseWare DataSet Terms mined as RDF tripletes LOCWD Triplestore Extraction of OCW data RDF data URI links URIs for OCW things RDF for describe OCW resources Links to other LOD - things Map the terms mined to terms already in the LOD Cloud Connect OCW Data with Other RDF Repositories LOCWD Linked Open Course Ware Data LOERD Linked OER Data RDF vocabularies Legend LUD Linked Universities Data Content extraction from HTML pages Extraction of content from each OCW page (CC license verified ) Use of crawling and scraping techniques raw content Temporary Repository for store of html content extracted stream of extracted content Extraction of data patterns (Classification, and applying of clustering SNA techniques ) non-reliable data or erroneous data data corrected Cleasing Data (detecting and correcting corrupt or inaccurate data RDF triplestore Relational database Software agent Get information from RSS subscription Get RDF content, if available Apply scraping technique Get embebed content in HTML pages 11
12 2. Common Vocabulary Modeling university name University country university oficial web site OCW repository OCW repository name state of repository Platform URL OCW repository Knowledge Area OCW001 RSS link Course title Course Description Creation date Tag Meaning tag Tag list OERs Licensed Language Author FirstName LastName Language OER link OER Subject university organization unit Gender OER type DBLP OER language 12
13 Data available from an OpenCourseWare OCW University knowledge area Title Author(s) Department syllabus bibliography year ects credits time autoself description
14
15 Consuming and visualization of OCW-RDF Demonstration of Linked Data Queries in LOCWD: Queries, Maps, Mobiles, Recommender Systems, Faceted Searchs. Query A: Title for the OCW UPMSW08 PREFIX dc: < PREFIX xsd: < PREFIX locwd: < SELECT?ocwTitle, ocwdescription WHERE { < dc:title?ocwtitle. < dc:description?ocwdescription. } Results >> Ontologies and Semantic Web, 2008 >> "The general objective is to provide students with a sound grounding of scientific, methodological and technological fundamentals in Ontological Engineering and the Semantic Web areas... 15
16 GoogleMaps to visualize Linked OCW Data 16
17 concept extraction desambiguation entity equivalence LUD publication You might like... RDF Data Store recomendations Other OER OCW suggested Recommender System based on Linked OCW Data
18 STUDY CASE: FACETED QUERY OF OCW BASED ON LINKED OPENCOURSEWARE DATA
19 OCW and OER raw data now! Linked Data is Data Interoperability The need for communication and interoperation between autonomous and distributed information systems is increasing with the increasing usage of the Web. e.g. interoperability between heterogeneous and distributed OCW/OER repositories
20 Benefits Why publish Linked OCW Data? Because LinkedData holds the potential to move our OCW collections out of their silos Open the data and content silos, to leverage the knowledge capital represented by our OCW repositories To enrich our information landscape, to improve visibility To improve ease of discovery open academic resources To improve ease of consumption and reuse of OCW To reduce redundancy in searched of OCW Promoting innovation and Added Value to Open
21 Thank you for your Attention! 2012 World Open Educational Resources Congress Wednesday 20 Friday 22 June, 2012 Room XII, UNESCO HQ, Paris, #WorldOER #OpenEducationalResources #OpenCourseWare #linkeddata #ocw #oer #SemWeb #SemanticWeb #LOCWD #LOD this work is licensed under a Creative Commons Atribución-NoComercial-SinDerivadas 3.0 Ecuador License
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