Comparisons

How Schema relates to other validation and parsing libraries. Three scopes are compared, and they are different:

• DataAnnotations and FluentValidation vs Constraint — value rules as inspectable data, independent of the model a field belongs to.
• FluentValidation vs Schema — parsing constructs a trusted model instead of validating one that already exists.
• zod vs Schema — the same parse-don't-validate idea in F#, with no reflection and a compiled trusted path.

FSharpPlus/FsToolkit.ErrorHandling vs Result compares the independent Result composition tools.