Every document instance requires a name that should uniquely identify it within its doctype.
Within a doctype the name of a document instance is recommended to be unique.
This uniqueness of a name within its doctype is not enforced. Documents may be added to a search by specifying a couple of spaces. But it is good practice to check this uniqueness within a space. Typically the title of a Wiki page is identical with the name. But there are exceptions from this rule, to make the documentation process easier.
Names must not contain parentheses or brackets of any kind.