[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [X] UBL (Universal Business Language), purchase order example 2nd UI binding expressions 2nd union operator (|), in computed expression Universal Business Language [See UBL] upload form control URI request method 2nd URI scheme 2nd 3rd URIs, Addressability, and the use of HTTP GET (W3C TAG) urlencoding 2nd user space for datatype UTF-8 basis for urlencoding |