ELIXIR e-learning definitions and guidelines for e-learning course development

a resource or software application whose primary function is to collect information (metadata) about ERs from multiple sources and to disseminate it via a single interface. Aggregators can actively search the Internet for ERs, or use established data-exchange links with ER producers, pulling metadata from them using standard information-exchange protocols (e.g., OAI-PMH), or receiving metadata through push mechanisms from 3rd parties. TeSS is an example of an ER aggregator.