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

UltraEdit, and SAXON 246
underlining text with CSS 221
Unicode 248
unique values, defining attributes to contain 52
unordered groups 97
controlling how many 101
unparsed content 62-65
unqualified (not associated with a namespace) 124, 125
uri-reference type, in XML Schema 76
URL
and namespace names 114
declaring element to contain 76
use attribute, in XML Schema 109, 110
UTC, description 79
UTF-8 or UTF-16 encodings 24