Frame/Assets/Scripts/Procedure/ProcedureAttribute.cs

using System;

namespace Game
{
    [AttributeUsage(AttributeTargets.Class)]
    class ProcedureAttribute: Attribute
    {
        public ProcedureType ProcedureType { get; set; }

        public ProcedureAttribute(ProcedureType type)
        {
            this.ProcedureType = type;
        }
    }
}