A file with the .xml extension is an Extensible Markup Language (XML) file. It's essentially a plain text file that uses custom tags to describe the structure and other characteristics of the document. In this article, let's explore what an XML file is , how to open an XML file, and the uses of this file format.
What is XML?
XML is a markup language used to define the syntax for encoding documents that are readable by both humans and computers. It uses tags to define the document structure, as well as how documents are stored and transmitted.
The easiest way to understand it is to compare XML to another markup language that many people may be familiar with – HTML (Hypertext Markup Language), which is used to code web pages. HTML uses a set of predefined tags to describe the formatting of content, for example:
This is how you make bold text and this is how you make italic text
The major difference of XML is its extensibility. XML does not have a fixed set of tags like HTML. Instead, users can create their own tags to describe content, creating an unlimited and self-defined set of symbols.
Simply put, HTML focuses on presenting content, while XML is a language specifically designed for describing and storing data.
What are XML files used for?
XML is often used as the foundation for many other document formats, for example:
- RSS and ATOM: used in news reading applications to process news feeds.
- Microsoft .NET: uses XML for configuration files.
- Microsoft Office, from version 2007 onwards, uses XML as the foundation for document structure. The 'X' in .DOCX, .XLSX, and .PPTX formats represents XML.
- Small database
- Android user interface
- Application configuration file
Therefore, having an XML file doesn't necessarily indicate which software a user will open it with. Generally, people don't need to worry about that, unless they are the ones who designed and created the XML file.
How to open an XML file
Users have several ways to open XML files:
- Text editor
- Web browser
- This website specializes in processing XML (viewing, editing, and converting).
- Application-specific software
- Integrated Development Environment (IDE)
- Microsoft Excel
Depending on the intended use, people choose the appropriate tool. If only a single tool is needed, use a plain text editor.
If you frequently work with XML, you should use a text editor to open it. Because XML is essentially a plain text file, you can open it with any text editor. However, many default editors, such as Notepad on Windows, will not display XML correctly.
To read and work more efficiently, people should use advanced tools such as:
- Visual Studio Code (VS Code) displays syntax highlighting and clear formatting.
- Notepad++
- Sublime Text
Below is the same XML file opened with VS Code, which is much easier to read than Notepad.