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Enhancing the learning content through the aggregation of social data.

Enhancing the learning content through the aggregation of social data. Frans Van Assche University of Leuven President of the ARIADNE Foundation. Paradata. What users say about a resource; example: a rating of a Learning Object

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Enhancing the learning content through the aggregation of social data.

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  1. Enhancing the learning content through the aggregation of social data. Frans Van Assche University of Leuven President of the ARIADNE Foundation

  2. Paradata • What users say about a resource; example: a rating of a Learning Object • What users do with a resource: Usage Data; example a user edits metadata

  3. Property id actor verb object result context timestamp stored authority version attachments Type UUID UUID Object Object Object Object Date/Time Date/Time Object Version Array of attachment Objects The Experience API (xAPI)

  4. xAPI example { "id": "12345678-1234-5678-1234-567812345678", "actor": { "mbox": "mailto:xapi@adlnet.gov" }, "verb": { "id": "http://adlnet.gov/expapi/verbs/created", "display": { "en-US": "created" } }, "object": { "id": "http://example.adlnet.gov/xapi/example/activity" } }

  5. Contextualized Attention Metadata (CAM)

  6. { "event": { "name": "name", "datetime": "2011-02-02 14:49:21", "eventRelatedentityRelations": [{ "eventRelatedentityId": { "relatedentity": { "name": "name1", "type":"type1", "reference": "reference1", "mimetype": "mimetype1", "metadata": [{ "metadataHash": "METADATA HASHED IN SHA-512", "metadata": "metadata1", "metadataType": "metadataType1", "metadataBinding": "metadataBinding1" }] }, "role": "role1" } },{ "eventRelatedentityId": { "relatedentity": { ... }, "role": "role2" } }], "sessions": [{ "sessionId": "sessionId", "domain": "domain", "ipAddress": "ipAddress" }] } } xAPI example

  7. Property actor content generator icon id object published provider target title updated url verb Type Object JSON [RFC4627] String Object Media Link JSON [RFC4627] String Object [RFC3339] date-time Object Object JSON [RFC4627] String [RFC3339] date-time JSON [RFC4627] String JSON [RFC4627] String JSON Activity Streams

  8. { "published": "2011-02-10T15:04:55Z", "actor": { "url": "http://example.org/martin", "objectType" : "person", "id": "tag:example.org,2011:martin", "image": { "url": "http://example.org/martin/image", "width": 250, "height": 250 }, "displayName": "Martin Smith" }, "verb": "post", "object" : { "url": "http://example.org/blog/2011/02/entry", "id": "tag:example.org,2011:abc123/xyz" }, "target" : { "url": "http://example.org/blog/", "objectType": "blog", "id": "tag:example.org,2011:abc123", "displayName": "Martin's Blog" } } xAPI example

  9. Property Id Actor Verb Object Result Timestamp Stored Version ipAddress sessionId Type ID (iTEC) ID (iTEC) Character String ID (iTEC) Object Date/Time Date/Time Character String URI Identifier iTEC Usage Data

  10. iTEC Example { "id": "http://itec-directory.eun.org/Paradata/1234505", "actor": "http://itec-directory.eun.org/User/40903", "verb": "edit", "object": "http://itec-directory.eun.org/Event/205", "result": "ok", "stored": "29-07-2013T14:10:05.123", "version": "1.0", "ipAddress": "http://123.123.123.1", "sessionId": "85C69908F30B01C09E47D8698B75AEEE" }

  11. Recommended JSON Binding PracticeWHY • Make it easier to build front-ends • On top of multiple back ends • Interoperability • This is an invitation to technical people for collaboration

  12. Recommended JSON Binding PracticeWHAT • Element names • Identifiers • Date/Time & Period • LangString • VocabularyTerm • Vocabularies

  13. Element names • Display_Name • display_name • display-name • displayName • Camel case • Starting with lower case

  14. Identifier Scheme • UUID or GUID – Good to know • RFC 4122. See http://www.ietf.org/rfc/rfc4122.txt • Example f81d4fae-7dec-11d0-a765-00a0c91e6bf6 12345678-1234-5678-1234-567812345678

  15. Date/Time & Duration • Based on ISO 8601 • http://www.w3.org/TR/NOTE-datetime or http://www.w3.org/TR/xmlschema-2/#isoformats • Example 29-07-2013T14:10:05.123Z YYYY[-MM[-DD[Thh[:mm[:ss[.s[TZD]]]]]]] where: YYYY = four-digit yearMM = two-digit monthDD = two-digit day of monthhh = two digits of hour (00 through 23)mm = two digits of minute (00 through 59)ss = two digits of second (00 through 59)s = one or more digits representing a decimal fraction of a secondTZD = time zone designator ("Z" for UTC or +hh:mm or -hh:mm) • Example Duration: P1Y3M5DT7H10M3.3S

  16. LangString "description": [ { "lang": "en", "text": "This learning object ..." }, { "lang": "nl", "text": "Dit leerobject ... " } ] "description": [ { "en": "This learning object ..." }, { "nl": "Dit leerobject ... " } ]

  17. Vocabulary Term "subjects": [ "508", "974" ], "categories": [ "expert", "teacher" ] A simple Token or identifier

  18. { "subjects": [ { "id": 508, "langString": [ { "en": "foreign language" }, { "nl": "Vreemde talen" } ] }, { "id": 974, "langString": [ { "en": "physical education" }, { "nl": "Lichamelijke opvoeding" } ] } ] } Extended

  19. { "subjects": [ { "id": 508, "source": "http://voc1", "langString": [ { "en": "foreign language" }, { "nl": "Vreemde talen" } ] }, { "id": 974, "source": "http://voc2", "langString": [ { "en": "physical education" }, { "nl": "Lichamelijke opvoeding" } ] } ] } Complete

  20. Vocabulary Term "subjects": [ "508", "974" ], "categories": [ "expert", "teacher" ] Full Vocabulary needed

  21. Enhancing the learning content through the aggregation of social data. GRNET and Ariadne Nikos Manolis

  22. Open Discovery Space • A large-scale pilot project that tries to increase the adoption of digital learning resources by European schools • An infrastructure to allow existing learning portals and repositories to be connected

  23. Social Data types • Ratings • Tags • Comments • Bookmarks • Sharings

  24. The need for aggregating • An important information source to provide additional and more personalized access to learning objects • Provide the opportunity to filter and recommend tailored information to a target user based on their social data profile

  25. Developing a Social Data Management Layer • Method: • A questionnaire was circulated among data providers • Cross analysis of the questionnaire results • Analysis of the various social data exposure protocols and interfaces • Social Data schema definition (existing efforts from Organic Edunet, LRE and NSDL)

  26. ODS basis schemata

  27. ODS Social Data schema

  28. Technological Background • An extended version of Ariadne Harvester is used for harvesting social data • Internal validation mechanism according to the Social Data schema validation • An extended version of Ariadne Repository is used for already harvested social data management • OAI-PMH endpoint for social data exposure • Social Data are also exposed in JSON format using an extended version of the built-in RESTP API

  29. Architecture.

  30. Some indicative numbers

  31. Next Steps • Harvest from more providers • Expose social data as Linked Data. • Connect LO Metadata with harvested Social Data. • Integrate harvested social data to Portal. • Recommender subsystem. • Search subsystem.

  32. Thank you!

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