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In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.
The Basic Latin Unicode block, [3] sometimes informally called C0 Controls and Basic Latin, [4] is the first block of the Unicode standard, and the only block which is encoded in one byte in UTF-8. The block contains all the letters and control codes of the ASCII encoding.
Incorrect HTML entity escaping may also open up security vulnerabilities for injection attacks such as cross-site scripting. If HTML attributes are left unquoted, certain characters, most importantly whitespace, such as space and tab, must be escaped using entities. Other languages related to HTML have their own methods of escaping characters.
Web pages authored using HyperText Markup Language may contain multilingual text represented with the Unicode universal character set.Key to the relationship between Unicode and HTML is the relationship between the "document character set", which defines the set of characters that may be present in an HTML document and assigns numbers to them, and the "external character encoding", or "charset ...
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Although many pages only use ASCII characters to display content, very few websites now declare their encoding to only be ASCII instead of UTF-8. [29] Virtually all countries and languages have 95% or more use of UTF-8 encodings on the web. Many standards only support UTF-8, e.g. JSON exchange requires it (without a byte-order mark (BOM)). [30]
Christmas Alphabet Drinking Game Go through the alphabet in a circle, as each person says a Christmas related name, item, song, and so on, for the letter they have. If you hesitate or draw a blank ...
In 2019, Alphabet's Sycamore quantum processor solved a complex task in 200 seconds. At the time, the world's fastest supercomputer would have needed 10,000 years to perform the same task.