You can inspect the language itself using inspectors called introspectors.

Here are some example queries to try:

properties whose (it as string contains "file")

properties whose (result type of it = type "file")

properties of type "file"


unary operators

binary operators

binary operators returning (type "integer")


If you evalaute the last one, 'properties', most of the items at the top of the list are the core types and introspectors.