UTF-8

수학노트
둘러보기로 가기 검색하러 가기

노트

위키데이터

말뭉치

  1. The first 128 UTF-8 characters precisely match the first 128 ASCII characters (numbered 0-127), meaning that existing ASCII text is already valid UTF-8.[1]
  2. A character in UTF8 can be from 1 to 4 bytes long.[2]
  3. UTF-8 can represent any character in the Unicode standard.[2]
  4. HTML 4 supports UTF-8.[2]
  5. One of the really nice features of UTF-8 is that it is compatible with nul-terminated strings.[3]
  6. For characters equal to or below 2047 (hex 0x07FF), the UTF-8 representation is spread across two bytes.[3]
  7. UTF-8 remains a simple, single-byte, ASCII-compatible encoding method, as long as no characters greater than 127 are directly present.[3]
  8. A: Yes, there are several possible representations of Unicode data, including UTF-8, UTF-16 and UTF-32.[4]
  9. For example, in UTF-8 every byte of the form 110xxxxx 2 must be followed with a byte of the form 10xxxxxx 2 .[4]
  10. Latin-1. UTF-8 uses the bytes in the ASCII only for ASCII characters.[4]
  11. UTF-8 is the byte-oriented encoding form of Unicode.[4]
  12. In this post, I’ll explain the basics of one technology central to text on the web, UTF-8.[5]
  13. UTF-8 is an encoding system for Unicode.[5]
  14. There are other encoding systems for Unicode besides UTF-8, but UTF-8 is unique because it represents characters in one-byte units.[5]
  15. More specifically, UTF-8 converts a code point (which represents a single character in Unicode) into a set of one to four bytes.[5]
  16. The originally proposed encodings of the UCS, however, were not compatible with many current applications and protocols, and this has led to the development of UTF-8, the object of this memo.[6]
  17. All standard UCS encoding forms except UTF-8 have an encoding unit larger than one octet, making them hard to use in many current applications and protocols that assume 8 or even 7 bit characters.[6]
  18. CESU-8 operates similarly to UTF-8 but encodes the UTF-16 code values (16-bit quantities) instead of the character number (code point).[6]
  19. This leads to different results for character numbers above 0xFFFF; the CESU-8 encoding of those characters is NOT valid UTF-8.[6]
  20. UTF-8 is a variable-width character encoding used for electronic communication.[7]
  21. The Use of the main encodings on the web from 2001 to 2012 as recorded by Google,with UTF-8 overtaking all others in 2008 and over 60% of the web in 2012.[7]
  22. The World Wide Web Consortium recommends UTF-8 as the default encoding in XML and HTML (and not just using UTF-8, also stating it in metadata), "even when all characters are in the ASCII range ..[7]
  23. In locales where UTF-8 is used alongside another encoding, the latter is typically more efficient for the associated language.[7]
  24. UTF-8 and Unicode Unicode Transformation Format 8-bit is a variable-width encoding that can represent every character in the Unicode character set.[8]
  25. UTF-8 encodes each Unicode character as a variable number of 1 to 4 octets, where the number of octets depends on the integer value assigned to the Unicode character.[8]
  26. The MIME character set attribute for UTF-8 is UTF-8 .[8]
  27. UTF-8 is a variable-width encoding that can represent every character in the Unicode character set.[9]
  28. UTF-8 encodes each character using one to four bytes.[9]
  29. A is U+0041, which in UTF-8 is simply encoded with the single byte 41.[9]
  30. In comparison, the Unicode hexidecimal code for the character is U+233B4, which in UTF-8 is encoded with the four bytes F0 A3 8E B4.[9]
  31. , how UTF-8 decoders handle various types of | corrupted or otherwise interesting UTF-8 sequences.[10]
  32. According to ISO 10646-1, sections R.7 and 2.3c, a device receiving | UTF-8 shall interpret a "malformed sequence in the same way that it | interprets a character that is outside the adopted subset".[10]
  33. This means | usually that the malformed UTF-8 sequence is replaced by a replacement | character (U+FFFD), which looks a bit like an inverted question mark, | or a similar symbol.[10]
  34. It might be a good idea to visually distinguish a | malformed UTF-8 sequence from a correctly encoded Unicode character | that is just not available in the current font but otherwise fully | legal.[10]
  35. The browser interprets those numbers as UTF-8, and internally converts them into Unicode code points.[11]
  36. If you display the page using the UTF-8 character set, you will see only 3 characters: HЯ⾀.[11]
  37. UTF-8 is becoming the most popular international character set on the Internet, superseding the older single-byte character sets like ISO-8859-5.[11]
  38. Perhaps the Ð looks familiar - it will sometimes show up if you try to view Russian UTF-8 documents.[11]
  39. UTF-8 uses one byte to represent code points from 0-127.[12]
  40. The first UTF-8 byte signals how many bytes will follow it.[12]
  41. UTF-8 pads the leading bits with three 0 s to fully “fill out” the remaining spaces.[12]
  42. The en_US.UTF-8 locale provides multiscript processing support by using UTF-8 as its codeset.[13]
  43. After you install the Japanese locale, you can use ATOK12 in all UTF-8 locales.[13]
  44. If your message contains characters from a mixture of scripts, the default MIME charset is UTF-8 .[13]
  45. Any 8-bit characters of UTF-8 are encoded with Quoted-Printable encoding.[13]
  46. The "I can eat glass" phrase and initial translations (about 30 of them) were borrowed from Ethan Mollick's I Can Eat Glass page (which disappeared on or about June 2004) and converted to UTF-8.[14]
  47. Kermit 95 displays UTF-8 and also allows keyboard entry of arbitrary Unicode BMP characters as 4 hex digits, as shown HERE.[14]
  48. EMACS 21.1 actually supports UTF-8; earlier versions don't know about it and display the octal codes; either way is OK for this purpose.[14]
  49. UltraEdit / UEStudio provides support for Unicode (16-bit wide character, or UTF-16) and UTF-8 files.[15]
  50. You can directly edit UTF-8 and UTF-16 files and convert them between ANSI and Unicode formats.[15]
  51. String occurrences "charset=utf-8" or "encoding=utf-8" in the file.[15]
  52. If the file is determined to be UTF-8, it will be treated as such and on open, it will be converted internally to Unicode (16-bit) for editing.[15]
  53. This report shows the usage statistics of UTF-8 as character encoding on the web.[16]
  54. UTF-8 is a byte oriented encoding.[17]
  55. UTF-8 is one of the most commonly used encodings, and Python often defaults to using it.[17]
  56. If you don’t include such a comment, the default encoding used will be UTF-8 as already mentioned.[17]
  57. Python supports writing source code in UTF-8 by default, but you can use almost any encoding if you declare the encoding being used.[17]
  58. WebSEAL implements multi-locale support by internally maintaining and handling all data using UCS Transformation Format 8 byte (UTF-8) encoding .[18]
  59. WebSEAL handles data internally in UTF-8 regardless of the locale in which the WebSEAL process is running.[18]
  60. Note that most operating systems do not use UTF-8 by default.[18]
  61. Local code pages can by UTF-8 or not UTF-8.[18]
  62. The UTF-8 encoding of Unicode and UCS does not have these problems and is the common way in which Unicode is used on UNIX-style operating systems.[19]
  63. All possible 2^31 UCS codes can be encoded using UTF-8.[19]
  64. The bytes 0xc0, 0xc1, 0xfe, and 0xff are never used in the UTF-8 encoding.[19]
  65. * UTF-8 encoded UCS characters may be up to six bytes long, however the Unicode standard specifies no characters above 0x10ffff, so Unicode characters can be only up to four bytes long in UTF-8.[19]
  66. Rust’s propensity for exposing possible errors, strings being a more complicated data structure than many programmers give them credit for, and UTF-8.[20]
  67. In Chapter 4, we talked about string slices, which are references to some UTF-8 encoded string data stored elsewhere.[20]
  68. a growable, mutable, owned, UTF-8 encoded string type.[20]
  69. Let’s look at some of our properly encoded UTF-8 example strings from Listing 8-14.[20]
  70. utf-8 , where utf is short for unicode transformation format, is a method of encoding unicode characters using one to four bytes per character.[21]
  71. Internally, Tcl uses modified utf-8 encoding, which is the same as utf-8 except that the NUL character (\u0000) is encoded as the bytes 0xC0 0x80, which is not a valid utf-8 sequence.[21]
  72. This doesn't play well with encoding convertto utf-8 though, as that will reencode each surrogate in the pair as a separate character.[21]
  73. Overview ▾ Package utf8 implements functions and constants to support text encoded in UTF-8.[22]
  74. It includes functions to translate between runes and UTF-8 byte sequences.[22]
  75. DecodeLastRune unpacks the last UTF-8 encoding in p and returns the rune and its width in bytes.[22]
  76. An encoding is invalid if it is incorrect UTF-8, encodes a rune that is out of range, or is not the shortest possible UTF-8 encoding for the value.[22]
  77. Create a UTF-8 encoding.[23]
  78. Text Class Example Public Shared Sub Main() ' Create a UTF-8 encoding.[23]
  79. Create a UTF-8 encoding that supports a BOM.[23]
  80. Text Class Example Public Shared Sub Main() ' Create a UTF-8 encoding that supports a BOM.[23]
  81. UTF-8 is a standard for representing Unicode numbers in computer files.[24]
  82. Therefore it is good practice to prefix a UTF-8 file with three special bytes, called the Byte Order Mark header (BOM header).[24]
  83. The HESA data collection system always outputs its UTF-8 files with BOM headers.[24]
  84. It is strongly recommended that institutions use UTF-8 BOM headers in their submitted XML files.[24]
  85. So, the first UTF-8 byte is used for encoding ASCII, giving the character set full backwards compatibility with ASCII.[25]
  86. UTF-8 means that ASCII and Latin characters are interchangeable with little increase in the size of the data, because only the first byte is used.[25]
  87. UTF-8 allows users to work in a standards-compliant and internationally accepted multilingual environment, with a comparatively low data redundancy.[25]
  88. Despite this, many people regard UTF-8 in online communication as abusive.[25]
  89. For more information, see Section 10.9.2, “The utf8mb3 Character Set (3-Byte UTF-8 Unicode Encoding)”.[26]
  90. Converts a string encoded in ANSI to UTF-8 with a given code page.[27]
  91. One benefit of UTF-8 is its ability to deal with languages that have 100s and 1000s of characters.[28]
  92. UTF-8 is a clever way of encoding Unicode text.[29]
  93. I’ve mentioned it a couple times lately, but I haven’t blogged about UTF-8 per se.[29]
  94. UTF-8 is a way of encoding Unicode so that an ASCII text file encodes to itself.[29]
  95. When software reading UTF-8 comes across a byte starting with 1, it counts how many 1’s follow before encountering a 0.[29]
  96. The use utf8 pragma tells the Perl parser to allow UTF-8 in the program text in the current lexical scope.[30]
  97. The no utf8 pragma tells Perl to switch back to treating the source text as literal bytes in the current lexical scope.[30]
  98. Do not use this pragma for anything else than telling Perl that your script is written in UTF-8.[30]
  99. Bytes in the source text that are not in the ASCII character set will be treated as being part of a literal UTF-8 sequence.[30]
  100. UTF-8 uses an 8-bit code unit, and UTF-16 uses a 16-bit code unit.[31]
  101. UTF-8 was designed to be backward compatible with ASCII.[31]
  102. UTF-16 is a variable length encoding system, like UTF-8, but uses 2 bytes (16 bits) as the minimum for any character representation.[31]
  103. However, early version of the UTF-8 specification got some entries wrong (in some cases it permitted overlong characters).[32]
  104. UTF-8 encoders are supposed to use the "shortest possible" encoding, but naive decoders may accept encodings that are longer than necessary.[32]
  105. Techniques Try to use UTF-8 encoding of content in Scripts in order to bypass validation routines.[32]
  106. Try to use UTF-8 encoding of content in HTML in order to bypass validation routines.[32]
  107. Now known as “UTF-8”, FSS-UTF was essentially completed.[33]
  108. The first argument is a character encoding name, like "UTF-8" or "ASCII" or "EUC-JP".[34]
  109. Database drivers can be flaky; if you use DBD::SQLite with just Perl, it will work out, but if some other tool has put text stored as some encoding other than UTF-8 in your database...[34]
  110. Unless you say use utf8 at the top of each file, Perl will not assume that your source code is UTF-8.[34]
  111. It prints the UTF-8 data with a poo at the end of each line.[34]

소스

  1. ↑ UTF-8 - MDN Web Docs Glossary: Definitions of Web-related terms
  2. ↑ 2.0 2.1 2.2 HTML UTF-8 Reference
  3. ↑ 3.0 3.1 3.2 UTF-8 Encoding
  4. ↑ 4.0 4.1 4.2 4.3 UTF-8, UTF-16, UTF-32 & BOM
  5. ↑ 5.0 5.1 5.2 5.3 What is UTF-8 Encoding? A Guide for Non-Programmers
  6. ↑ 6.0 6.1 6.2 6.3 UTF-8, a transformation format of ISO 10646
  7. ↑ 7.0 7.1 7.2 7.3 Wikipedia
  8. ↑ 8.0 8.1 8.2 UTF-8 and Unicode Standards
  9. ↑ 9.0 9.1 9.2 9.3 A Guide to UTF-8 Encoding in PHP and MySQL
  10. ↑ 10.0 10.1 10.2 10.3 UTF-8 test file
  11. ↑ 11.0 11.1 11.2 11.3 Unicode, UTF8 & Character Sets: The Ultimate Guide — Smashing Magazine
  12. ↑ 12.0 12.1 12.2 What is UTF-8?
  13. ↑ 13.0 13.1 13.2 13.3 Chapter 5 Overview of UTF-8 Locale Support (International Language Environments Guide)
  14. ↑ 14.0 14.1 14.2 UTF-8 Sampler
  15. ↑ 15.0 15.1 15.2 15.3 Unicode / UTF-8 support
  16. ↑ Usage Statistics and Market Share of UTF-8 for Websites, December 2020
  17. ↑ 17.0 17.1 17.2 17.3 Unicode HOWTO — Python 3.9.1 documentation
  18. ↑ 18.0 18.1 18.2 18.3 Multi-locale support with UTF-8
  19. ↑ 19.0 19.1 19.2 19.3 Linux manual page
  20. ↑ 20.0 20.1 20.2 20.3 The Rust Programming Language
  21. ↑ 21.0 21.1 21.2 utf-8
  22. ↑ 22.0 22.1 22.2 22.3 The Go Programming Language
  23. ↑ 23.0 23.1 23.2 23.3 UTF8Encoding Class (System.Text)
  24. ↑ 24.0 24.1 24.2 24.3 Common Unicode and UTF-8 issues
  25. ↑ 25.0 25.1 25.2 25.3 Gentoo Wiki
  26. ↑ MySQL :: MySQL 5.6 Reference Manual :: 10.9.3 The utf8 Character Set (Alias for utf8mb3)
  27. ↑ UTF-8 Conversion Routines
  28. ↑ MoodleDocs
  29. ↑ 29.0 29.1 29.2 29.3 How UTF-8 Unicode encoding works
  30. ↑ 30.0 30.1 30.2 30.3 Perl pragma to enable/disable UTF-8 (or UTF-EBCDIC) in source code
  31. ↑ 31.0 31.1 31.2 Introduction to Unicode and UTF-8
  32. ↑ 32.0 32.1 32.2 32.3 CAPEC-80: Using UTF-8 Encoding to Bypass Validation Logic (Version 3.3)
  33. ↑ UTF-8: the network standard
  34. ↑ 34.0 34.1 34.2 34.3 Why does modern Perl avoid UTF-8 by default?

메타데이터

위키데이터

Spacy 패턴 목록

  • [{'LEMMA': 'UTF-8'}]
  • [{'LOWER': 'filesystem'}, {'LOWER': 'safe'}, {'LEMMA': 'utf'}]
  • [{'LOWER': 'fss'}, {'OP': '*'}, {'LEMMA': 'UTF'}]
  • [{'LEMMA': 'UTF-2'}]
  • [{'LOWER': 'utf'}, {'LEMMA': '8u'}]
  • [{'LEMMA': 'utf8'}]
  • [{'LOWER': '8-bit'}, {'LOWER': 'unicode'}, {'LOWER': 'transformation'}, {'LEMMA': 'format'}]
  • [{'LOWER': 'unicode'}, {'LOWER': 'transformation'}, {'LOWER': 'format'}, {'OP': '*'}, {'LEMMA': '8-bit'}]
  • [{'LOWER': 'unicode'}, {'LOWER': 'transformation'}, {'LOWER': 'format'}, {'OP': '*'}, {'LEMMA': '8-bit'}]
원본 주소 "https://wiki.mathnt.net/index.php?title=UTF-8&oldid=51406"