Update proposals/2758-textual-id-grammar.md
@@ -41,8 +41,10 @@ The grammar is defined as follows:
* Identifiers starting with the characters `m.` are reserved for use by the
formal matrix specification.
* Implementations wishing to implement unspecified identifiers should follow
- the Java Package Naming conventions of using a reversed domain name, for
- example `com.example.identifier`.
+ the Java Package Naming convention of starting with a reversed domain
+ name (with a dot after the domain name part). For example, for the
+ organisation `example.com`, a valid identifier would be
+ `com.example.identifier`.
This grammar is intended for use entirely by internal identifiers, and *not*
for user-visible strings.
