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International Components for Unicode (ICU) is an open-source project of mature C/C++ and Java libraries for Unicode support, software internationalization, and software globalization. ICU is widely portable to many operating systems and environments. It gives applications the same results on all platforms and between C, C++, and Java software.
Some naming conventions limit whether letters may appear in uppercase or lowercase. Other conventions do not restrict letter case, but attach a well-defined interpretation based on letter case. Some naming conventions specify whether alphabetic, numeric, or alphanumeric characters may be used, and if so, in what sequence.
where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form. The x must be lowercase in XML documents. The nnnn or hhhh may be any number of digits and may include leading zeros. The hhhh may mix uppercase and lowercase, though uppercase is the usual style.
Latin Capital letter M: U+004E N Latin Capital letter N: U+004F O Latin Capital letter O: U+0050 P Latin Capital letter P: U+0051 Q Latin Capital letter Q: U+0052 R Latin Capital letter R: U+0053 S Latin Capital letter S: U+0054 T Latin Capital letter T: U+0055 U Latin Capital letter U: U+0056 V Latin Capital letter V: U+0057 W Latin Capital ...
The format of an email address is local-part@domain, where the local-part may be up to 64 octets long and the domain may have a maximum of 255 octets. [5] The formal definitions are in RFC 5322 (sections 3.2.3 and 3.4.1) and RFC 5321—with a more readable form given in the informational RFC 3696 (written by J. Klensin, the author of RFC 5321) and the associated errata.
A non-empty scheme component followed by a colon (:), consisting of a sequence of characters beginning with a letter and followed by any combination of letters, digits, plus (+), period (.), or hyphen (-). Although schemes are case-insensitive, the canonical form is lowercase and documents that specify schemes must do so with lowercase letters.
C, C++, Python, C#, Java: Similar to Base64, but modified to avoid both non-alphanumeric characters (+ and /) and letters that might look ambiguous when printed (0 – zero, I – capital i, O – capital o and l – lower-case L). Base58 is used to represent bitcoin addresses.
Small caps, petite caps and italic used for emphasis True small caps (top), compared with scaled small caps (bottom), generated by OpenOffice.org Writer. In typography, small caps (short for small capitals) are characters typeset with glyphs that resemble uppercase letters but reduced in height and weight close to the surrounding lowercase letters or text figures. [1]