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Aggregating metadata from
educational repositories the ODS
experience
Edrene Conference, 6 May2014, Athens
Kostas Vogias (...
2
Harvesting
ODS
Repositories
3
Processing and importing
Process
Updater
Repository Harvesting Usable Repository Harvesting Usable Repository Harvesting Usable
Dryades 251,047 250,591 SET for the...
Workflow Representation
Repository
Registry
XSL
Registry
Harvesting Transformation ValidationIdentification Filtering
Link...
Logging System
• Live automatic updates.
• Good for repository administrators and Data providers.
Parsing
Logstash
Index V...
Aggregation Results Visualization
Metadata Aggregation Workflow
7
Distributed metadata indexing to Elastic Search
cluster.
Scalability.
Replication.
Distributed backup.
Availability.
Searc...
23
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Aggregating metadata from educational repositories the ODS experience, Kostas Vogias

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Aggregating metadata from educational repositories the ODS experience, Kostas Vogias

  1. 1. Aggregating metadata from educational repositories the ODS experience Edrene Conference, 6 May2014, Athens Kostas Vogias (GRNET) , Enayat Rajabi (UAH) vogias@admin.grnet.gr Enayat.rajabi@uah.es 1
  2. 2. 2 Harvesting ODS Repositories
  3. 3. 3 Processing and importing Process Updater
  4. 4. Repository Harvesting Usable Repository Harvesting Usable Repository Harvesting Usable Dryades 251,047 250,591 SET for the resources Natural Europe 3,089 2,926 Photodentro/Educ ational Video repository 676 676 MACE 186,152 94,725 OpenScout 56,247 40,851 CARNet School Portal 513 513 Moodle for CARNet's Users 89,615 89,423 I2G Intergeo 2,847 2,846 Bulgarian National Educational Repository /Resursi 500 500 Discover the COSMOS 81,520 81,380 SET for the pathways Natural Europe 125 123 Rural Observatory 409 399 LA FLOR 56,858 54,036 OER Commons (Green OER) 2,770 2,389 Digis 389 386 Znam.bg 60,986 60,986 Photodentro/ Digital School LOR 2,702 2,702 OSR 1977 343 Organic.Edun et 10,937 9,169 LaProf 752 752 SIVECO LRE Repository 92 92 Miksike’s LeFo 3,798 3,797 Educanext (LMS.at, Bildungspool) 322 322 Total harvesting 814,323 Usable 699,927 Statistics for 2nd Harvesting Cycle 4
  5. 5. Workflow Representation Repository Registry XSL Registry Harvesting Transformation ValidationIdentification Filtering Link Checking Logging Log Visualization Metadata Analysis Metadata Analysis Lang Detection 5
  6. 6. Logging System • Live automatic updates. • Good for repository administrators and Data providers. Parsing Logstash Index Visualize
  7. 7. Aggregation Results Visualization Metadata Aggregation Workflow 7
  8. 8. Distributed metadata indexing to Elastic Search cluster. Scalability. Replication. Distributed backup. Availability. Search API over Repository. Data Providers registry content exposure using Elastic Search. Brainstorming 22
  9. 9. 23

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