Full Idea
Kant provided a 'metaphysical deduction' of the categories by deriving them from the fundamental forms of judgement. He also gave a 'transcendental deduction' of the categories ...as the indispensable conditions of our knowledge and experience of objects
Gist of Idea
Kant deduced the categories from our judgements, and then as preconditions of experience
Source
report of Immanuel Kant (Critique of Pure Reason [1781]) by Stephen Houlgate - An Introduction to Hegel 02 'From indeterminate'
Book Reference
Houlgate,Stephen: 'An Introduction to Hegel' [Blackwell 2005], p.31
A Reaction
I'm suspicious of the second method, because it seems that all you can do is make up an explanation of experience, with very little to go on, because it is hidden. Analysing the way we make judgements is more interesting.