Index U

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z]

union of classes, OWL  
updateBase element, RSS Syndication module  
updateFrequency element, RSS Syndication module  
updatePeriod element, RSS Syndication module  
URI (Uniform Resource Identifier)  
       absolute or partial  
       relative, resolving  
       RSS requirements for   2nd  
       for vocabulary namespace  
uriref nodes  
URL (Uniform Resource Locator)  
URN (Uniform Resource Name )  
Userland, role in growth of RSS  
UUID (Universally Unique Identifier)