struct Author end
    struct MyVersion end
    struct License end
    struct Category end
    struct Tags end
    struct MyBool end
    struct NewInt end

    @mtkmodel TestMetadataModel begin
        @metadata begin
            Author = "Test Author"
            MyVersion = "1.0.0"
            License = "MIT"
            Category => "example"
            Tags = ["test", "demo", "metadata"]
            MyBool => false
            NewInt => 1
        end
        
        @parameters begin
            k = 1.0, [description = "Gain parameter"]
        end
        
        @variables begin
            x(t), [description = "State variable"]
            y(t), [description = "Output variable"]
        end
        
        @equations begin
            D(x) ~ -k * x
            y ~ x
        end
    end

julia> @named test_model = TestMetadataModel()
Model test_model:
Equations (2):
  2 standard: see equations(test_model)
Unknowns (2): see unknowns(test_model)
  x(t): State variable
  y(t): Output variable
Parameters (1): see parameters(test_model)
  k [defaults to 1.0]: Gain parameter