In general, CSCW research on knowledge sharing has moved from a “repository model”, which focused on externalizing knowledge in documents and databases, to an “expertise sharing” model, which focuses on helping people find relevant knowledge from other knowledgeable people directly p.532-533
The shift from the “[repository model]” of CSCW work to focus on “[expertise sharing]” was stimulated in large part by rich discoveries about the large extent to which useful knowledge is tacit and situated tacit knowledge p.547
[boundary object]s derive part of their power (for facilitating cross-organizational/boundary coordination and work) by being “weakly structured in common use, and strongly structured in specific use”