In Web development, tag soup refers to formatted markup written for a Web page which is very much like HTML, but may not consist of correct HTML syntax and document structure.

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  • In Web development, tag soup refers to formatted markup written for a Web page which is very much like HTML, but may not consist of correct HTML syntax and document structure. Because web browsers have historically treated HTML syntax or structural errors leniently, there has been little pressure for web developers to follow published standards, and therefore it is necessary that all browser implementations treat what looks like HTML as "tag soup", accepting and correcting for invalid syntax and structure. An HTML parser, such as a web browser, which is capable of interpreting HTML-like markup even if it contains invalid syntax or structure may be called a tag soup parser. All major web browsers currently use a tag soup parser when interpreting HTML or content it believes to be HTML. Tag soup may collectively refer to a large number of common authoring mistakes, such as malformed HTML tags, improperly-nested HTML elements, and unescaped character entities (especially ampersands and less-than signs). Alternatively, the term tag soup may occasionally be applied to any markup which uses poor methodology such as the misuse of HTML elements for semantic purposes other than which they were intended. Though not strictly syntactically or structurally incorrect, such code can be hard for a human reading the source code or a non-visual user agent to interpret meaningfully. Although often thought of as typifying private and semi-professional or hobbyist Web sites, tag soup is created by many professional web page layout programs, and written by hand by many professional web developers for some of the highest-profile sites.
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  • In Web development, tag soup refers to formatted markup written for a Web page which is very much like HTML, but may not consist of correct HTML syntax and document structure.
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  • Tag soup
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