The purpose of the Enterprise Continuum is to classify assets applicable across the entire scope of the Enterprise Architecture. These assets can be called building blocks. Include things like: objectives, policies, capabilities, etc.
The purpose of the Architecture Continuum is to illustrate how architectures are developed
Strategic Architectures - long-term summary of entire enterprise
Segment Architectures - more detailed models for area in enterprise
Capability Architectures - detailed. how can support a unit of functionality. includes current, target, increment, etc.
The purpose of the Standards Information Base is to hold a set of specification to which architectures must conform. Include legal, industry, organizational.