There is a growing interest in synchronous CSCL systems that combine a communication space with a task space for supporting knowledge building by distributed or co-located small groups of learners. In that context, in which collaborative learning processes are scattered above two distinct spaces, deictic references to the objects in both spaces, the time of learners' actions, and the identity of participants are very important. This paper describes a structured collection of high-level patterns whose purpose is to catalog and document design knowledge about the mechanisms, resources and practices for deictic referencing.