SBVR16 — 'another' unnecessarily restricts the concept 'other'

In clause A.2.2, the keyword 'another' is introduced, with the interpretation:

(used with a term that has been previously used in the same statement) existential quantification plus a condition that the referent thing is not the same thing as the referent of the previous use of the term

The idea "existential quantification plus" is an unnecessary and undesirable addition. The useful keyword is 'other'. As described, "other X" means "instance of the general concept X that is not the same thing as the referent of the previous occurrence of the term X". But "another" is just a conventional spelling of "an other", and might equally have been spelled "some other". The term 'other' can be usefully quantified by quantifiers other than "an". Each other, at least n other, at most n other, exactly n other, and no other are all valid uses of 'other' with the given interpretation, less the "existential quantification plus".

Defining only the portmanteau keyword 'another' greatly and unnecessarily limits the expressiveness of SBVR Structured English in this area.