In the revised taxonomy, knowledge is at the basis of these six cognitive processes, but its authors created a separate taxonomy of the types of knowledge used in cognition: Factual Knowledge Knowledge of terminology Knowledge of specific details and elements Conceptual Knowledge Knowledge of classifications and categories Knowledge of principles and generalizations Knowledge of theories, models, and structures Procedural Knowledge Knowledge of subject-specific skills and algorithms Knowledge of subject-specific techniques and methods Knowledge of criteria for determining when to use appropriate procedures Metacognitive Knowledge Strategic Knowledge Knowledge about cognitive tasks, including appropriate contextual and conditional knowledge Self-knowledge

The authors of the revised taxonomy underscore this dynamism, using verbs and gerunds to label their categories and subcategories (rather than the nouns of the original taxonomy). These “action words” describe the cognitive processes by which thinkers encounter and work with knowledge: Remember Recognizing Recalling Understand Interpreting Exemplifying Classifying Summarizing Inferring Comparing Explaining Apply Executing Implementing Analyze Differentiating Organizing Attributing Evaluate Checking Critiquing Create Generating Planning Producing