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It means the reference was added with the visual editor, rather than the source editor. You can change these to something more mnemonic if you like, though be careful to do so for all instances of any given reference you change. I believe there's a tool available to convert them to mnemonic names, though I can't remember where to find it. Mike Christie (talk - contribs - library) 23:48, 26 September 2023 (UTC)
