POSIX gettext() and NLSPATH

[Bruno Haible]

https://posix.rhansen.org/p/gettext_draft
Line 130
"indicates that catopen( ) should look ..."
What does the gettext family of functions do when NLSPATH is set to this
value?

Line 136
"indicates that the gettext family of functions ..."
What does the catopen() function when NLSPATH is set to this value?

There is some explanation in example 5. But IMO it's not immediately clear
how this applies to example 1 and example 2.