Question about JSON-LD and searchengines

Dear all,

The last few days, I have been busy with the correctness of my JSON-LD
format (thanks Gregg ^^). Now I got the correct format, is there any way to
tell searchengines that my website uses JSON-LD?
I don't know if I am correct but I read (git issues) something like this:

If my url is https://www.seoprovider.nl/seo-pakketten/mkb-geavanceerd/
and my JSON-LD is located at
https://www.seoprovider.nl/seo-pakketten/mkb-geavanceerd.jsonld
can't I use something like this:

<script type="application/ld+json" src="
https://www.seoprovider.nl/seo-pakketten/mkb-geavanceerd.jsonld"></script>

or should I include the content of the JSON-LD within the script tag after
I defined the data-context (which makes the HTML-document bigger)?

Let me know.
-- 
Kind regards and big thanks in advance,

Ka-Sing Chou