cuelang.org: no mention of 'source' field or "algorithm" for determining module contents

[myitcv]

What page were you looking at?

https://cuelang.org/docs/reference/modules/

What version of the site were you looking at?

cue-lang/cuelang.org@24ebac4

What did you do?

Visited the above page.

What did you expect?

Expected to find details of the source field and the "algorithm" that determines a module's contents given a source.

What did you see instead?

Nothing.