type Person struct {
    Name    string `md:"title"`
    Age     int
    Address struct {
        City  string
        State string
    }
}
p := Person{}
p.Name = "John Doe"
p.Age = 30
p.Address.City = "Sprintfield"
p.Address.State = "IL"
md := mdcodec.Marshal(p)
fmt.Println(md)
// Output:
// # John Doe (Person)
//
// - **Age**: 30
// - **Address**:
//   - **City**: Springfield
//   - **State**: IL

var p Person
err := mdcodec.Unmarshal(md, &p)