IA areas of practice diagram

Jess McMullen diagrams Lou Rosenfeld's view of the field, where he says I see information architecture as the intersection of three areas (imagine yet another three-circled Venn diagram): users: (who they are, what their information-seeking behaviors and needs are) content: (volume, formats, metadata, structure, organization) context: (business model, business value, politics, culture, resources and resource constraints)