xml
XML: EXTENSIBLE MARKUP LANGUAGE
1, tags and elements
Tag: Descriptive string in angle brackets and angle brackets. It is just a label, tells the user agent, such as a browser, how to interpret the elements between the tag.
Element: The content between markers and tags. Empty elements also need to be closed, there are two ways.
2, attribute
Any tag can have attributes, with the "name / value" pair.
3, marker language
SGML: Standard Generalized Markup Language, standard universal tag language. Tag language for creating other tag language.
HTML: HTML is much more simply than SGML, and the size is just some of SGML, and. It is also very easy to learn. This is also the rapid popularity of HTMI, which is widely used for all kinds of personnel. HTML was founded in 1991 by Tzm Bemers-Lee. At that time, HTML as a method of professional tag pages, allowing these pages to be organized and transmitted between various professional societies.
Xml
4. Create an XML document
XML is case sensitive. The property must be placed in double quotes.
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XML has learned many times, I only look at it here, the rest is not written!
