Says why a relationship id will not do: it is the RDN, a URL segment and a button label, so it is a letter or digit then letters, digits, dot, dash and underscore, up to 63 characters.
the id
the problem, or the empty string
Says why a relationship id will not do: it is the RDN, a URL segment and a button label, so it is a letter or digit then letters, digits, dot, dash and underscore, up to 63 characters.