I've been reading the documentation around Express Migration, in preparation for trying it on a site, and I've come across a sentence in the release notes that I don't quite understand:
The text refers to "IDs on etalon, source and target" - but I do not understand what "etalon" means in this context. It's not a word I've come across before in Sitecore documentation or in English.
I can't find that issue number on the knowledge base site. But a bit of googling suggests the word can mean "a piece of optical equipment for measuring wavelength", "a horse used for breeding" (if you add an accent) or "standard" if you translate from French. The first two of those are clearly unrelated, and the third still doesn't make the meaning of that sentence entirely clear to me.
My best guess so far is it might mean "the default state of a Sitecore database, as supplied in an install package".
But I'm wondering if anyone can confirm whether I'm right or not?