The interest of the Electronic Medical Record EMR is from now on obvious. However, Health Professionals still not have at their disposal tools allowing them to support their cooperative practices. In the French DocPatient project, we try to improve practitioners' cooperation when they use the medical documents by implementing a document-based EMR. Our assumption is that a best integration of the way they use these medical documents in the EMR design will improve its utility, its use and its acceptance. In this paper, we show that annotations practices must be transposed in the EMR to reinforce collaboration, coordination and awareness.