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A comment on Why “children,” not “childs”? (2016). Parent comment

Re:Why “children,” not “childs”? (2016) by mc32 on Sunday May 27, 2018 @05:47PM (#17169271)
In some contexts the plural of datum is datums, making it a bit more complicated than just a collective noun.
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Re:Why “children,” not “childs”? (2016) by weinzierl on Monday May 28, 2018 @03:00AM (#17170971)
That's interesting. I've never encountered "datums" but a quick Google search turned up plenty of examples (like "Tidal Datums") and that "This plural is permissible only in the sense of 'fixed reference points'" [1].

Which contexts did you have in mind?

[1] https://en.wiktionary.org/wiki/datums

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Re:Why “children,” not “childs”? (2016) by mc32 on Monday May 28, 2018 @12:22PM (#17173233)
Yes things like surveying and mapping was what I was thinking—similar.
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