Re: Internal links to lines in different org files

[Max Nikulin]

On 28/01/2023 19:35, kevin lucas wrote:
> from a different org file write a link like [[foo::my_code][Some code]] 
> and have it refer back to the exact line in the first file.

Usually links in org start with "type:" prefix. I can not say it for 
sure, but your link looks like a fuzzy link (search in the same file).

I recommend you to run

    M-x org-link RET

for a report on possible issues with your file.

> 2. If this behavior isn’t in org mode, could it be added?

First of all, have a look into (info "(org) Search Options") 
https://orgmode.org/manual/Search-Options.html
Notice "file:" type of the links.

> 3. Connected to this: if I export an org file containing an ordinary 
> link to another node to PDF, the PDF compiles and I get a dead link in 
> the file. If one tries to export org files with these double colon links 
> there's an error message `Unable to resolve ID "foo::myname"`. Is there 
> a way to generate the PDF just like in the first case?

Export may be affected by some bugs. Try to open PDF file in a browser 
to inspect what is the target of the exported link.