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Excess tags in acrobat?

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From: Laurie Kamrowski-Lamb
Date: Mar 29, 2019 12:16PM

I have been going over some legacy content for my school's pdfs, and I've
been noticing that some of the larger documents are causing memory leaks in
acrobat, and upon inspection I've been finding a lot blank tags that
apparently have nothing in them, and once I remove them from the document
it clears up the memory leaks and I'm able to get the rest of the document
running smoothly. Has anyone else encountered this issue?

The tags also do not follow logical reading order, so instead of the
document tags running 1 2 3 4 5 6 7, they come out like 5, 2, 1, 4, 3, 7, 6
(as an example).

Could this be because these documents are older? I've also noticed that
they had some tables scanned in (not original electronic format, a scan of
a table printed out). My boss is asking for the nature of these issues and
I just wanted to have a more solid answer than just a hunch.

Thank you for your time,

Laurie