The concept of a universal directory does not exist on Internet. There are thousands of directories of all kinds and online Yellow Pages in many countries. All of these websites are different, accessed differently and operated differently: for example, Yellow Pages in France are different from their equivalent in Spain and Italy. There is no standard directory operated behind a same name worldwide.
This is what project John Wolley offers: a universal directory operated behind a single domain name extension.
I am a new gTLD Consultant based in Paris. "New gTLD" stands for "new generic Top-Level Domains" from the ICANN new gTLD program. They are new domain name extensions such as ".consulting" (instead of ".com").