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Content Sharing whence & whither? Nikos Manouselis Agro-Know Technologies & ARIADNE Foundation [email protected] @ILIAS 2012, Stuttgart, 6/9/12
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Content Sharing whence & whither?
Nikos ManouselisAgro-Know Technologies & ARIADNE Foundation
[email protected] @ILIAS 2012, Stuttgart, 6/9/12
Metadata Sharing whence & whither?
Nikos ManouselisAgro-Know Technologies & ARIADNE Foundation
[email protected] @ILIAS 2012, Stuttgart, 6/9/12
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
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
who is Ariadne?
so Ariadne helped
Theseus to navigate through a labyrinth
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
various components/services
More than a harvester:
Validation Service Repository Software Registry Service Harvester
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Powered by
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
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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
GLOBE is powered by ARIADNE• an instance of the metadata aggregation infrastructure of ARIADNE
is used to support federated search in allied GLOBE repositories
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 ]
e-learning & metadata
“e-Learning”
“e-Learning”
“e-Learning”
learning object
"any entity, "any entity, digitaldigital or non-digital, that may or non-digital, that may be used for be used for learninglearning, , educationeducation or or trainingtraining""
ΙΕΕΕ Learning Technology Standards Committee (2002)
learning object
"any entity, "any entity, digitaldigital or non-digital, that may or non-digital, that may be used for be used for learninglearning, , educationeducation or or trainingtraining““
+ metadata describing this use+ metadata describing this use
Publisher
Date Catalog
SubjectID
AuthorTitle
metadata – not new
educational metadata
NOT a learning object
…a learning object, in context
metadata reflect the context
e.g. resource metadata
e.g. activity metadata
e.g. course metadata
metadata aggregation
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
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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,…)
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looks like this
34 Ternier et al., 2010
a school aggregator
a university aggregator
a vocational training aggregator
typical problems
a. metadata authoring/creationb. metadata assurance/validationc. metadata values/vocabulariesd. metadata multilingualitye. …lots more
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a. authoring/creation
• metadata creation is a painful and costly process–automatic generation can help–high quality/accuracy/relevance
descriptions require human intervention
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a. authoring/creation
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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
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b. assurance/validation
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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
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c. values/vocabularies
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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
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d. multilinguality
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why should you then care?
promoting course descriptions
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• 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)
promoting course descriptions
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• 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)
promoting course descriptions
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• 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)
including relevant content
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• allow course creator/author to find relevant material and resources to enrich course– Europeana ingestion widget (
http://wiki.agroknow.gr/agroknow/index.php/Hack4Europe_2012)
• suggest to learners additional courses and material relevant to what they access– Eummena’s Moodle Widget (
http://www.eummena.org/index.php/labs)
including relevant content
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• allow course creator/author to find relevant material and resources to enrich course– Europeana ingestion widget (
http://wiki.agroknow.gr/agroknow/index.php/Hack4Europe_2012)
• suggest to learners additional courses and material relevant to what they access– Eummena’s Moodle Widget (
http://www.eummena.org/index.php/labs)
including relevant content
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• allow course creator/author to find relevant material and resources to enrich course– Europeana ingestion widget (
http://wiki.agroknow.gr/agroknow/index.php/Hack4Europe_2012)
• suggest to learners additional courses and material relevant to what they access– Eummena’s Moodle Widget
(http://www.eummena.org/index.php/labs)
developing more end-user services
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• 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)
developing more end-user services
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• 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)
developing more end-user services
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• 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)
developing more end-user services
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• 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)
future scenarios
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
findability of course descriptions
findability of course descriptions
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)
enchancing interactive interfaces
http://vimeo.com/1738770
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, …)
getting crowdsourced data
http://dev.mendeley.com/
extending social CMS components
http://voa3r.cc.uah.es
wrap upwrap up
METADATA AGGREGATOR
challenges• semantic evolution (Linked Open
Data)• data/content growth rates• usage logging & learning analytics• …more
interested to experiment?
