As part of the on-going Labex project "Past in the present", our proposal aims at highlighting the organizational issues of linked data projects that have to deal with pluri-institutional contexts, among which libraries. First, we will discuss what is at stake. Second, we will present a methodology based on the building of several diagrams which highlight technical, conceptual, and organizational obstacles. We will also address the issues of designing and producing an information system intended to ensure the transmission of scientific skills, the exploitation of major vocabularies, associated to specific vocabularies, by foreign institutions and the harmonizing or building of bridges between heterogeneous descriptions.