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A comment on Ask HN: What's the worst piece of software you use everyday?. Parent comment

Re:Ask HN: What's the worst piece of software you use everyday? by Rapzid on Saturday July 11, 2020 @08:23PM (#23807458)
It has a prefix index so it does indeed have the concept of hierarchy.
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Re:Ask HN: What's the worst piece of software you use everyday? by ForHackernews on Monday July 13, 2020 @05:19AM (#23818800)
Only if you think that prefix-matching implies hierarchy.

Are `invoice_2020_10_1.pdf` and `invoice_2020_11_1.pdf` children of their parent in the hierarchy, `invoice_2020_1`?

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