I've seen links in web pages on MacOS and IOS that invoke other apps, notably App Store and iBooks. If I recall correctly, they usually have a protocol¹ that in some way identifies the app.
I am using an HTML/PHP/MySQL app called Learning With Texts that allows it to create a URI to a web page with place holders to auto-insert a word to look up in an online dictionary. Now I know that ⌘⌃D can be used on MacOS to display all instances of a string that appear in any MacOS dictionary. I am wondering whether there is a URI syntax that will look it up in a specific dictionary. (And what is that syntax.)
In Catalina, if that matters.
¹the first part of the URI—in a web link, the protocol is “http” or “https”
x-man-page://
). I don’t recall seeing anything for the dictionary.<a href="dict://foobar">Lookup 'foobar' in Dictionary</a>
, however, it will open it in the Dictionary to whichever was last selected when it was closed. It also pops up the Do you want to allow this page to open “Dictionary”? you'd have to respond to.