!!! Overview
[{$pagename}] or the adjective "[OPTIONAL]" ([RFC 2119]), which are [Case-sensitive] ([RFC 8174]) mean that an item is truly optional.
One vendor may choose to include the item because a particular marketplace requires it or because the vendor feels that it enhances the product while another vendor may omit the same item.
We may use [{$pagename}] in other contexts but we are implying the same interpretation as a [Best Current Practice]
!! [LDAP]
[{$pagename}] (also seen as [OPTIONAL]) indicates the [Attributes] that [{$pagename}] contain values on an [ObjectClass].
!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]