3. about me
• Computer Engineer
• MSc’s on Operational Research +
Telecommunications
• PhD from Informatics Lab of an
Agricultural University
• working on e-learning content,
repositories & federations for the past
10 years
4. about me
• Computer Engineer
• MSc’s on Operational Research +
Telecommunications
• PhD from Informatics Lab of an
Agricultural University
• working on e-learning content,
repositories & federations for the past
10 years
8. so Ariadne
helped
Theseus to
navigate
through a
labyrinth
9. ARIADNE Foundation
• not-for-profit association aiming to foster
Share and Reuse of Learning Resources
• working on facilitating the reuse of digital
resources that can be used to support learning
• created a standards-based technology
infrastructure for metadata aggregation
• allows publication and management of
metadata records about digital learning
resources in an open and scalable way
10. various components/services
More than a harvester:
Validation Service
Repository Software
Registry Service
Harvester
Powered by
10
11. simplified scenario
• backend: periodical aggregation of metadata
from various providers
– harvesting through OAI-PMH protocol/targets, as
well as human-facilitated ingestion/import
– different metadata schemas/specs combined
– indexing metadata element values to use for faceted
search/browse
• front-end: interfaces to search/browse through
metadata descriptions of learning resources
11
12. alliance with
• member of Global Learning Objects
Brokering Exchange (GLOBE) Alliance
• contributing towards the development of a
global learning infrastructure that can be
accessible from all
• one-stop-shop for learning resource broker
organizations, each of them managing and/or
federating one or more learning object
repositories
www.globe-info.org
13.
14. GLOBE is powered by ARIADNE
• an instance of the metadata aggregation
infrastructure of ARIADNE is used to support
federated search in allied GLOBE repositories
15. also: Open Discovery Space
• CIP PSP funded initiative aiming to deploy a pan-
European open eLearning content infrastructure
[launched April’12; http://www.opendiscoveryspace.eu ]
21. learning object
"any entity, digital or non-digital, that may
be used for learning, education or
training"
ΙΕΕΕ Learning Technology Standards Committee (2002)
22. learning object
"any entity, digital or non-digital, that may
be used for learning, education or
training“
+ metadata describing this use
23. metadata – not new
Author Subject
ID Title
Publisher
Date Catalog
32. aggregating metadata records
• concerns viewing merged collections of
metadata records from different sources
• useful: when access to specific supersets or
subsets of networked collections
– records actually stored at aggregator
– or queries distributed at virtually aggregated
collections
32
33. popular approach: harvesting
• based on Open Archives Initiative
Protocol for Metadata Harvesting
(OAI-PMH)
– XML-driven technology
– wrappers for legacy systems often
developed
– implementations for various metadata
standards/specs (including DC, IEEE LOM,…)
33
38. typical problems
a. metadata authoring/creation
b. metadata assurance/validation
c. metadata values/vocabularies
d. metadata multilinguality
e. …lots more
38
39. a. authoring/creation
• metadata creation is a painful and
costly process
– automatic generation can help
– high quality/accuracy/relevance
descriptions require human intervention
39
41. b. assurance/validation
• good online services demand high
quality (or at least not poor quality)
description of content
– someone needs to take the final decision
before something is published
– especially relevant when content
development has been costly/labourous
41
43. c. values/vocabularies
• mappings and crosswalks among
values and vocabularies of different
collections are crucial
– usually manually defined and maintained
– difficult to ensure that all applications
will publish and link their vocabularies
– vocabulary bank management tend to
become too complex for the purpose
that they serve 43
45. d. multilinguality
• for multilingual contexts, everything
needs to become (and be maintained)
multilingual
– metadata values and labels
– interface labels for various systems
• automatic translation helps but usually
produces rather rough/poor
translations
45
48. promoting course descriptions
• push course information to various
syndication/aggregation sites to allow
users discover them
– OCW search engine (
http://www.ocwsearch.com)
– Moodle Hub concept (hub.moodle.org)
48
49. promoting course descriptions
• push course information to various
syndication/aggregation sites to allow
users discover them
– OCW search engine (
http://www.ocwsearch.com)
– Moodle Hub concept (hub.moodle.org)
49
50. promoting course descriptions
• push course information to various
syndication/aggregation sites to allow
users discover them
– OCW search engine (
http://www.ocwsearch.com)
– Moodle Hub concept (hub.moodle.org)
50
51. including relevant content
• allow course creator/author to find relevant
material and resources to enrich course
– Europeana ingestion widget (
http://wiki.agroknow.gr/agroknow/index.php/Hack4Europe_20
)
• suggest to learners additional courses and
material relevant to what they access
– Eummena’s Moodle Widget (
http://www.eummena.org/index.php/labs)
51
52. including relevant content
• allow course creator/author to find relevant
material and resources to enrich course
– Europeana ingestion widget (
http://wiki.agroknow.gr/agroknow/index.php/Hack4Europe_20
)
• suggest to learners additional courses and
material relevant to what they access
– Eummena’s Moodle Widget (
http://www.eummena.org/index.php/labs)
52
53. including relevant content
• allow course creator/author to find relevant
material and resources to enrich course
– Europeana ingestion widget (
http://wiki.agroknow.gr/agroknow/index.php/Hack4Europe_20
)
• suggest to learners additional courses and
material relevant to what they access
– Eummena’s Moodle Widget
(http://www.eummena.org/index.php/labs)
53
54. developing more end-user services
• Web portals to support user communities
(e.g. thematic, geographical, social, cultural)
– MACE portal (http://portal.mace-project.eu)
– Photodentro Greek school collections portal
(http://photodentro.edu.gr)
– VOA3R social platform for researchers
(http://voa3r.cc.uah.es)
54
55. developing more end-user services
• Web portals to support user communities
(e.g. thematic, geographical, social, cultural)
– MACE portal (http://portal.mace-project.eu)
– Photodentro Greek school collections portal
(http://photodentro.edu.gr)
– VOA3R social platform for researchers
(http://voa3r.cc.uah.es)
55
56. developing more end-user services
• Web portals to support user communities
(e.g. thematic, geographical, social, cultural)
– MACE portal (http://portal.mace-project.eu)
– Photodentro Greek school collections portal
(http://photodentro.edu.gr)
– VOA3R social platform for researchers
(http://voa3r.cc.uah.es)
56
57. developing more end-user services
• Web portals to support user communities
(e.g. thematic, geographical, social, cultural)
– MACE portal (http://portal.mace-project.eu)
– Photodentro Greek school collections portal
(http://photodentro.edu.gr)
– VOA3R social platform for researchers
(http://voa3r.cc.uah.es)
57
59. findability of course descriptions
• interoperable course metadata
published and aggregated, accessible
through multiple information
portals/channels
– curricula described in terms of learning
outcomes
– findable through requesting targeted
competences
62. interactive access
• multi-touch, interactive installations
enhancing the educational
experience
– related to both technology and content
industries
– deployment both at any educational
context (formal/informal)
64. social networking
• Connecting peers & visualising social
networks, connecting people with content
resources, recommending people/content
– Mendeley (www.mendeley.com), ResearchGate
(http://www.researchgate.net), Academia.edu
(http://academia.edu), ArnetMiner
(http://arnetminer.org), …
– Social research components in popular CMSs
(JomSocial, Drupal’s Buddylist, Elgg…)
– Social research components in institutional CMSs
(VIVO, …)