MITRE ATT&CK Framework
Knowledge base of adversary tactics and techniques. 200+ techniques across Enterprise, Mobile, ICS matrices.
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Where this one tends to earn its keep.
Red team exercise planning
SOC detection coverage mapping
Threat modeling and risk assessment
Security tool gap analysis
I haven't checked this label against the actual licence text — it's the catalogue's original guess. Check the ontology's own site before you rely on it.
Others worth a look in Cybersecurity.