Currently, format-number#2 is defined to be context-independent. However, the text says it uses the unnamed decimal format. Since this format is defined in the static context, it can be different in a different (static) context, hence I believe it should be marked context-dependent instead.

In XSLT for instance, you can have different unnamed decimal formats in different packages, which means that dependent on which package you use the static context can be different and hence the unnamed decimal format can be different.

Conversely, format-integer#3 is said to be context-independent, but the third parameter can be the empty sequence and the text says "then the number is formatted using the default language from the dynamic context.", which implies it is dependent on the dynamic context *if* it is empty.

I don't think the text is unclear or that implementers would have a difficulty here, it is merely in the defined properties of the function that come as a bit of a surprise (hence marked "Minor").