IDs defined under would simply have ID
_file/path/to/myfile.txt.bigb
don't have any scope, e.g.:= myfile.txt
{file}
\Image[dog.png]
{title=dog}
image-dog
.Headers marked with the the ID of the third header is just:and not:or:This is because a
\H
file
argument never have any scope e.g. in:= Toplevel
== My scope
{scope}
=== myfile.txt
{file}
_file/myfile.txt
my-scope/_file/myfile.txt
_file/my-scope/myfile.txt
{file}
header is already fully specified by its position in the tree or the given URL, so it doesn't make much sense to add more to it.