An improved method for handling instant messaging sessions in an instant messaging server is disclosed. The method comprises providing global annotators for annotating instant messaging communications, wherein instant messaging users are being able to select for a private enhancement stack at least one of the following: annotators and look-up services; providing instant messaging users with a capability to obtain contextual information by activating enhancement functions provided by said private enhancement stack; establishing an instant messaging session between a set of instant messaging users; and supporting sharing said contextual information among said set of instant messaging users as part of the instant messaging session.
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