Embodiments of the present invention address deficiencies of the art in respect to collaborative information object management and provide a method, system and computer program product for annotating collaborative information structures. In an embodiment of the invention, a method for annotating collaborative information structures can be provided. The method can include creating a collaborative information structure document (ISD) with each of an object section and an annotation section, adding a collaborative object in a collaborative computing environment to the object section of the collaborative ISD, adding an annotation for the collaborative ISD to the annotation section of the collaborative ISD, and storing the collaborative ISD for use as a collaborative object in the collaborative computing environment.