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A numeric character reference in HTML refers to a character by its Universal Character Set/Unicode code point, and uses the format &#nnnn; or &#xhhhh; 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.
More specifically, HTML 4.0 documents are required to consist of characters in the HTML document character set : a character repertoire wherein each character is assigned a unique, non-negative integer code point. This set is defined in the HTML 4.0 DTD, which also establishes the syntax (allowable sequences of characters) that can produce a ...
As another example, if some text was created originally using the MacRoman character set, the left double quotation mark “ will be represented with code point xD2. This will not display properly in a system expecting a document encoded as UTF-8, ISO 8859-1, or CP-1252, where this code point is occupied by the letter Ò .
Include both xml:lang and lang attributes on any elements assigning language. Use the empty-element syntax only for elements specified as empty in HTML. Include an extra space in empty-element tags: for example < br /> instead of < br />. Include explicit close tags for elements that permit content but are left empty (for example, < div ></ div ...
A code point is represented by a sequence of code units. The mapping is defined by the encoding. Thus, the number of code units required to represent a code point depends on the encoding: UTF-8: code points map to a sequence of one, two, three or four code units. UTF-16: code units are twice as long as 8-bit code units.
A data point or observation is a set of one or more measurements on a single member of the unit of observation. For example, in a study of the determinants of money demand with the unit of observation being the individual, a data point might be the values of income, wealth, age of individual, and number of dependents.
Examples include Rakuten, Ibotta, Honey and Capital One Shopping. Receipt-scanning apps. These apps require you to scan or upload photos of your physical shopping receipts to earn cash back or points.
The 1024 points in the range U+D800 – U+DBFF are known as high-surrogate code points, and code points in the range U+DC00 – U+DFFF (1024 code points) are known as low-surrogate code points. A high-surrogate code point followed by a low-surrogate code point forms a surrogate pair in UTF-16 in order to represent code points greater than U+FFFF .