[1, "4. THE DEFINITE ARTICLE"] tells that "Collective nounts" are used with THE definite article. Examples: "The French, The army, the
Why do wiki's "List of collective nouns by subject A-H" lists all collectives with indefinite article?
For example, "An army of ants"?
PRACTICAL REALISATIONS OF ENGLISH DEFINITE AND
The text that pdf link points to is confusing. Starting with the title, it doesn't instill confidence and then it begins like this about Modifiers and Substitutors:
All of them share one main characteristic.
However, some of the groups act only one way, some limit the reference of the noun
as deictics do and yet others can represent a noun or a phrase with the same form or
with a different form by means of contextualised associations.
It hasn't even been spellchecked properly. It lists taxis as a singular noun.