电路图中REF DES是什么意思啊？谢谢了啊

What is a RefDes?
RefDes is short for Reference Designator. A RefDes is a
unique identifier, or value, that you assign to an
occurrence of an electrical part (typically a connector) in the context of a harness assembly. In general
terms, the RefDes maps that part occurrence to a schematic, wiring diagram, or electrical connectivity data.
就是说refdes是一个元件、线路、集总线……等的标识号/定位号

不懂，REF一般表示参考，如参考电压