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Briefly mention how fn-pandt relates to legacy P&T 

Signed-off-by: Nic Cope <nicc@rk0n.org>
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Nic Cope 2024-08-23 12:31:04 -07:00
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content/master/guides/function-patch-and-transform.md
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@ -13,6 +13,16 @@ A [patch](#create-a-patch) copies a value from one resource and _patches_ it
onto another resource. A [transform](#transform-a-patch) modifies the values
before applying the patch.
{{<hint "tip" >}}
All Compositions used Patch and Transform before Crossplane added
support for composition functions.
Function Patch and Transform works like legacy `mode: Resources` Compositions,
which Crossplane deprecated in v1.17. The difference is that it uses a
`mode: Pipeline` Composition and a function instead of a `mode: Resources`
Composition.
{{< /hint >}}
Here's an example Composition that uses Function Patch and Transform. When you
create an `AcmeBucket` XR that uses this Composition, Crossplane uses the
template to create the Amazon S3 `Bucket` MR.