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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.
An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). [vague] The first used version of HTML was written by Tim Berners-Lee in 1993 and there have since been many versions of HTML.
The property's name and value context are described by the item's vocabulary. Properties values usually consist of string values, but can also use URLs using the a element and its href attribute, the img element and its src attribute, or other elements that link to or embed external resources. [1]
HTML element content categories. HTML documents imply a structure of nested HTML elements. These are indicated in the document by HTML tags, enclosed in angle brackets thus: < p >. [73] [better source needed] In the simple, general case, the extent of an element is indicated by a pair of tags: a "start tag" < p > and "end tag" </ p >. The text ...
Accept: text/html: Permanent RFC 9110: Accept-Charset: Character sets that are acceptable. Accept-Charset: utf-8: Permanent RFC 9110: Accept-Datetime: Acceptable version in time. Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT: Provisional RFC 7089: Accept-Encoding: List of acceptable encodings. See HTTP compression. Accept-Encoding: gzip ...
An enumerated list of all allowable values. Each enumerated value is a string that for brevity represents a specific meaning. For example, for a PersonGenderCode the valid values might be "male", "female" or "unknown". Date: An ISO 8601 date usually in the format YYYY-MM-DD DateTime An ISO 8601 date (in the format YYYY-MM-DD) AND time structure ...
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.
people_list is a valid element name, and an instance of such an element contains any number of person elements. The * denotes there can be 0 or more person elements within the people_list element. person is a valid element name, and an instance of such an element contains one element named name , followed by one named birthdate (optional), then ...