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How to understand XML? in view of this problem, this article introduces the corresponding analysis and answer in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

XML is a set of rules that define semantic tags that divide a document into many parts and identify them. It is also a meta-markup language, that is, a syntactic language that defines other domain-specific, semantic, structured markup languages.

The first thing to understand about XML is that it's not just like Hypertext markup language (Hypertext Markup Language,HTML) or formatted programs. These languages define a fixed set of tags that describe a certain number of elements. If there are no required tags in the markup language, there is nothing the user can do about it. At this point, we have to wait for the next version of the markup language, hoping to include the required markup in the new version, but it will depend on the choice of the software developer.

But XML is a meta-markup language. Users can define the tags they need. These tags must be created according to some general principles, but they are also quite flexible in the sense of tags. For example, if a user is dealing with a family tree and needs to describe a person's birth, death, burial place, family, marriage, divorce, etc., you must create a tag for each item.

XML defines a set of meta-syntax that must be followed by domain-specific markup languages such as MusicML, MathML, and CML. If an application can understand this meta-syntax, then it can automatically understand all the languages established by this meta-language. Browsers do not have to know in advance each tag used by many different markup languages. The truth is that the browser doesn't know the markup used by a given document until it reads the document or its DTD. Detailed instructions on how to display the contents of these tags are provided by additional stylesheets attached to the document.

Having XML means you don't have to wait for browser developers to meet the needs of users. Users can create the tags they need, and when needed, just tell the browser how to display them.

The second thing to know about XML is that XML tags describe the structure and meaning of the document. It does not describe the formatting of page elements. Available style sheets add formatting information to the document. The document itself only describes what tags the document contains, not what it looks like.

XML allows different majors (such as music, chemistry, mathematics, etc.) to develop markup languages relevant to their specific fields. This allows people in this field to exchange notes, data and information without having to worry about whether the receiver has specific software to create data. Developers in a particular field can even send documents to people outside their field, and there is good reason to think that at least those who accept the document can view the contents of the document.

The answer to the question about how to understand XML is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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