Index - U
| uchar | Network.Parser.Rfc3986 |
| unreserved | Network.Parser.Rfc3986 |
| upalpha | Network.Parser.Rfc2234 |
| upalphaPred | Network.Parser.Rfc2234 |
| URI | |
| 1 (Type/Class) | Network.Types |
| 2 (Data Constructor) | Network.Types |
| uri | Network.Parser.Rfc3986 |
| URIAuth | |
| 1 (Type/Class) | Network.Types |
| 2 (Data Constructor) | Network.Types |
| uriAuthority | Network.Types |
| uriFragment | Network.Types |
| uriPath | Network.Types |
| uriPort | Network.Types |
| uriQuery | Network.Types |
| uriReference | Network.Parser.Rfc3986 |
| uriRegName | Network.Types |
| uriScheme | Network.Types |
| uriUserInfo | Network.Types |
| userinfo | Network.Parser.Rfc3986 |
| utext | Network.Parser.Rfc2822 |