What is the difference between xml and html

Difference: 1. HTML is not case-sensitive, while XML is strictly case-sensitive; 2. Elements in XML that have a single tag but no matching closing tag must end with a "/" character, while html does not need to ;3. Attribute values ​​in XML must be enclosed in quotation marks. In HTML, quotation marks are available or not.

The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.

XML

XML (Extensible Markup Language) is also used to create web pages and web applications; it is dynamic because it is used to transfer data instead of using to display data.

The design goals of XML focus on simplicity, versatility and usability on the Internet. It is a text data format that provides strong support for different human languages ​​through Unicode. Although XML was designed primarily with a focus on documents, the language is widely used to represent arbitrary data structures, such as those used in web services.

HTML

HTML (Hypertext Markup Language) is a markup language used to create web pages and web applications. Through HTML, we can create our own static pages. It is used to display data, not to transmit data.

HTML is a combination of hypertext and markup language. Hypertext defines the links between web pages. Markup language is used to define text documents within markup that define the structure of a web page. This language is used to annotate (take notes for the computer) text so that the machine can understand it and manipulate the text accordingly.

The difference between HTML and XML

Through the above understanding of HTML and XML, let’s take a look at the differences and connections between them. Both xml and html are They are used to manipulate data or data structures. They are roughly the same in structure, but there are obvious differences in their essence.

(1) Different grammatical requirements:

1. It is not case-sensitive in html, but strictly distinguished in xml.

2. In HTML, sometimes it is not strict. If the context clearly shows where the paragraph or list key ends, then you can omit the ending like

or mark. In XML, it is a strict tree structure, and the closing tag must not be omitted.

3. In XML, elements that have a single tag without a matching closing tag must end with a / character. This way the parser knows not to look for the closing tag.

4. In XML, attribute values ​​must be enclosed in quotation marks. In HTML, quotation marks are optional.

5. In HTML, you can have attribute names without values. In XML, all attributes must have corresponding values.

6. In XML documents, the blank parts will not be automatically deleted by the parser; but html filters out the blanks.

(2) Different tags:

1. HTML uses inherent tags; xml does not have inherent tags.

2. Html tags are predefined; XML tags are free, customizable and extensible.

(3) Different functions:

1. HTML is used to display data; xml is used to describe data and store data, so it can be used as a persistence medium! Html combines data and display and displays the data on the page; xml

separates data and display. XML is designed to describe data, and its focus is the content of the data. HTML was designed to display data, with the focus being on the appearance of the data.

2. XML is not a substitute for HTML. XML and HTML are two languages ​​with different uses. XML is not meant to replace HTML; in fact, XML can be seen as a complement to HTML. The goals of XML and HTML are different. The design goal of HTML is to display data and focus on the appearance of the data, while the design goal of XML is to describe the data and focus on the content of the data.

3. XML without any behavior. Similar to HTML, XML does nothing. (Common ground)

4. The best description of XML may be: XML is a cross-platform, software- and hardware-independent tool for processing and transmitting information.

5. XML will be everywhere in the future. XML will become the most common tool for data processing and data transmission.

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