generate command

type Category struct {
	Name     string
	Category int
}

type Characteristic struct {
	UUID        string
	Name        string
	Constraints struct {
		ValidBits map[string]string

		ValidValues map[string]string

		MinimumValue interface{}

		StepValue interface{}

		MaximumValue interface{}
	}
	Format      string
	Permissions []string
	Properties  []string
	Unit        string
}

type Metadata struct {
	Categories      []Category
	Characteristics []Characteristic
	Version         string
	Services        []struct {
		OptionalCharacteristics []string

		RequiredCharacteristics []string

		Name string

		UUID string
	}
}