So we have 4 attributes for trusts: fixed or discretionary and irrevocable or revocable which you can mix to set up an appropriate trust.
How does the spendthrift trust fit in here? Is it another form of trust or is it simply stating a specific intend that is behind a trust. From the Schweser description: is used to transfer assets to a beneficiary who is too young or otherwise unable to manage the assets. Additionally, settlor retains some control over distribution.
To me it sounds like it can be any of the trust above which can be used to transfer the assets to somebody too young. Or is it another, separate type of trust specifically designed for transferring assets while retaining some control?