Tagging System

I use three tag layers: a domain tag, a type tag, and a status tag. Every note gets one of each.

Layer 1 — Domain Tags

programming
math
engineering

power-systems
distribution
renewable-der
power-electronics
control-systems
communications

engineering
information-systems
data-science
ai
agentic-ai
cybersecurity

dso
tpm
consulting

fe
pe
mba
phd-ee
phd-energy

Layer 2 — Content Type Tags

concept $\leftarrow$ definitions, theory, explanations
derivation $\leftarrow$ math/physics worked from first principles
proof $\leftarrow$ formal proofs
problem-set$\leftarrow$ practice problems with solutions
project $\leftarrow$ hands-on builds
summary $\leftarrow$ condensed review of a topic
reference $\leftarrow$ cheat sheets, quick lookup tables
reflection $\leftarrow$ what you learned, lessons, mistakes
roadmap $\leftarrow$ learning plans for a topic

Layer 3 — Status Tags

seedling $\leftarrow$ rough idea, just started
growing $\leftarrow$ active notes, in progress
evergreen $\leftarrow$ complete, stable, worth sharing
archived $\leftarrow$ no longer active