Adding custom answer in Mac Spotlight

Question

I saw that we have access to calculator in Spotlight! And I wonder how an application can add custom answer like calculator do!

Thank you!

Forgather

Answer 1

Simple answer: no, they can't. The only thing you can write is a custom importer your application that enable spotlight to index you application data (as documents or as a database)

Introduction to Spotlight (developer.apple.com)

Asa

So, the functionalities of Calculator are hard-coded into the source of Spotlight? – Hepatitis

Yes, same for the dictionary and web searches. – Asa