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Remove / Delete Non-Alphanumeric Characters (Commas, Dots, Special Symbols, Math Symbols etc.) from text. This typography -related article is a stub . You can help Wikipedia by expanding it .
In this case, only a single character set argument is used. The following command removes carriage return characters. tr -d '\r' The c flag indicates the complement of the first set of characters. The invocation tr -cd '[:alnum:]' therefore removes all non-alphanumeric characters.
Buckwalter transliteration is not compatible with XML, so "XML safe" versions often modify the following characters: < > & (أ إ and ؤ respectively; Buckwalter suggests transliterating them as I O W, respectively). Completely "safe" transliteration schemes replace all non-alphanumeric characters (such as $';*) with alphanumeric characters. [2]
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the ...
For simple, context-independent normalization, such as removing non-alphanumeric characters or diacritical marks, regular expressions would suffice.For example, the sed script sed ‑e "s/\s+/ /g" inputfile would normalize runs of whitespace characters into a single space.
However, all valid characters and sequences in the UCS, including all bidirectional controls or private-use assignments (but with the exception of non-whitespace C0 and C1 controls, non-characters, and surrogates) are also usable and valid in HTML, XML, XHTML and MathML, either in plain-text values of attributes or in text elements (by encoding ...
Files that contain machine-executable code and non-textual data typically contain all 256 possible eight-bit byte values. Many computer programs came to rely on this distinction between seven-bit text and eight-bit binary data, and would not function properly if non-ASCII characters appeared in data that was expected to include only ASCII text ...
The Unicode Consortium and the ISO/IEC JTC 1/SC 2/WG 2 jointly collaborate on the list of the characters in the Universal Coded Character Set.The Universal Coded Character Set, most commonly called the Universal Character Set (abbr. UCS, official designation: ISO/IEC 10646), is an international standard to map characters, discrete symbols used in natural language, mathematics, music, and other ...