Where possible, use the plural form of nouns in your index. If the plural is not applicable or is misleading, you must use the singular form. In the examples in this section, the comma represents the second index level.
Preferred
Discouraged
files, copying
file, copying
VDN assignments, changing
VDN assignment, changing
When to use the singular form
Use the singular form to refer to a unique entity. For example, if there is only one administration portal, do not use plural for it. Similarly, if you can only delete one user at a time, it is misleading to use the plural users.
