org-create-file-search-functions

org-create-file-search-functions is a variable defined in `org.el'.
Its value is

nil

• This variable may be risky if used as a file-local variable.

Documentation:
List of functions to construct the right search string for a file link.
These functions are called in turn with point at the location to
which the link should point.

A function in the hook should first test if it would like to
handle this file type, for example by checking the `major-mode'
or the file extension. If it decides not to handle this file, it
should just return nil to give other functions a chance. If it
does handle the file, it must return the search string to be used
when following the link. The search string will be part of the
file link, given after a double colon, and `org-open-at-point'
will automatically search for it. If special measures must be
taken to make the search successful, another function should be
added to the companion hook `org-execute-file-search-functions',
which see.

A function in this hook may also use `setq' to set the variable
`description' to provide a suggestion for the descriptive text to
be used for this link when it gets inserted into an Org-mode
buffer with M-x org-insert-link.