Going from a web of document to a web of knowledge is one of the key goal set by the creator of the World Wide Web, Sir Tim Berners-Lee. This dream is becoming a reality more each day with the development and the integration of new formats and new technologies to represent data as knowledge graphs, interlinking concepts within documents or databases together. This presentation will provide an overview of the generic concepts supporting Linked Data, including formats, the existing technologies supporting these formats, introduce the key existing initiatives relying on these technologies. We will also address the challenge of semantic/knowledge modeling in science and in other domains and the need for more tools to support the use of these technologies. In particular, we will present the semantic annotation service B2NOTE and how the formats and technologies are used to extend the description of datasets within EUDAT and allow the possibility to create new datasets from multiples sources and multiple domains.