what means "intervals".

[Takesi Ayanokoji]

Hi,

I have a question (perhaps a basic English question) about the term
"intervals" used in elisp manual.

This term is used in chapter: Text > section: Text Properties > subsection:
Why Text Properties are not Intervals.
https://www.gnu.org/software/emacs/manual/html_node/elisp/Not-Intervals.html#index-intervals

I Googled this, but I couldn't other meaning but "some amount between two
points".

So I guessed this is "inter-" + "values" means  "internal values".

Am I correct?

Thanks.