Many research studies have shown that the organizational learning is a key factor that contributes to the well being of the organization. The process of organizational learning is affected by the collaborative annotation which plays an important role in it. However , current collaborative annotation platforms have a common limitation which is the restricted ability to share , index , retrieve annotations as any other information resource (e. g a document). In this paper , we define the annotation and we indicate how it becomes collaborative. We present an original semantic model (MEMORAe-core 2) for collaboration and information sharing and we show how the annotation is modeled as information resource. We present a web platform (MEMORAe) that uses this semantic model. A use case for the use of this platform within small and medium sized enterprise is also detailed. Within this work , our objective is to support the organizational learning by concentrating on the exchange of ideas by means of the collaborative annotation .