Complex sentence: XDI and other open standard identity and data sharing protocols can handle the challenges of technical interoperability for the Social Web, but the challenge of business and social interoperability requires a new type of cooperative association similar to a credit card association.
Split into simpler sentences: XDI and other open standard identity and data sharing protocols can handle the problem of technical interoperability. But the challenge of business interoperability requires a new type of cooperative association similar to a credit card association.