Calculated representation references to string or enum?

[ghost]

Consider the following IML (CDL) example:

component CYGHWR_MEMORY_LAYOUT{ display "Memory layout" calculated [CYG_HAL_STARTUP == "RAM" ? (CYGHWR_HAL_I386_PC_LOAD_HIGH ? "i386_pc_ram_hi" : "i386_pc_ram") : CYG_HAL_STARTUP == "ROM" ? "i386_pc_rom" : CYG_HAL_STARTUP == "GRUB" ? (CYGHWR_HAL_I386_PC_LOAD_HIGH ? "i386_pc_grub_hi" : "i386_pc_grub") : "i386_pc_floppy" ] flavor data

and Clafer translation
CYGHWR_MEMORY_LAYOUT -> string display = "Memory layout" calculated: [this = CYG_HAL_STARTUP = "RAM" => (CYGHWR_HAL_I386_PC_LOAD_HIGH => "i386_pc_ram_hi" else "i386_pc_ram") else CYG_HAL_STARTUP = "ROM" => "i386_pc_rom" else CYG_HAL_STARTUP = "GRUB" => (CYGHWR_HAL_I386_PC_LOAD_HIGH => "i386_pc_grub_hi" else "i386_pc_grub") else "i386_pc_floppy"]

Is reference string, or it should be CYGHWR_MEMORY_LAYOUT_ENUM ?
with enum declaration
CYGHWR_MEMORY_LAYOUT_ENUM = "i386_pc_floppy" | "i386_pc_grub_hi" | "i386_pc_grub" | "i386_pc_rom" | "i386_pc_ram" | "i386_pc_ram_hi"