An overview of XML
1.XML a data storage format that stores data content while preserving the relationship between data
2.XML How to save data: XML uses tags to hold the contents of the data, using the nesting relationships between the tags to preserve the relationship between the data.
Applications for 3.XML:
(1) The XML cross-platform feature is used to transfer data between different operating systems and different development languages. If Java is a cross-platform language, then XML is a cross-platform data.
(2) XML can be used to preserve the characteristics of relational data, and it is often utilized as a configuration file.
4.XML file: The XML format data is saved to a file, so the file is usually suffixed with the name. XML, such a file is called an XML file, XML file is the most common form of existence of XML data, but this is not the only form of XML (in memory or in the network can also exist), do not narrow the XML into an XML file.
5.5XML check: The browser in addition to the built-in HTML parsing engine also built-in XML parser, using the browser to open XML-formatted data, you can do XML validation.
XML Overview in Web development