


Detailed introduction to document and declaration usage in XML
This article mainly introduces the usage of documents and declarations in XML. It is the basic knowledge for introductory learning of XML. Friends who need it can refer to it
An XML document is an organized element and other tags The basic unit of XML information composed of. An XML _document_ can contain a wide variety of data. For example, in a numerical database, numbers represent molecular structures or mathematical formulas.
XML Document Example
A simple XML document example is provided below:
<?xml version="1.0"?> <contact-info> <name>Tanmay Patil</name> <company>TutorialsPoint</company> <phone>(011) 123-4567</phone> </contact-info>
The following figure depicts the XML document part.
Document Prologue
Document Prologue is at the top of the document, before the root element. This section contains:
XML Declaration
The XML declaration contains details that prepare the XML handler to parse the XML document. It is optional, but when used it must appear on the first line of the XML document.
Syntax
The following syntax shows the XML declaration:
<?xml version="version_number" encoding="encoding_declaration" standalone="standalone_status" ?>
Each parameter consists of the parameter name, the equal sign (=), and the parameter value wrapped in quotes. The following table shows the details of the above syntax:
Rules
XML declarations should comply with the following rules:
If an XML declaration appears in XML , it must be placed on the first line of this XML document.
If an XML declaration is included, the version number attribute must be included.
Parameter names and values are case-sensitive.
The order in which parameters are placed is important. The correct order is: version, encoding and standalone.
You can use single quotes or double quotes.
XML declaration has no closing tag, such as ?xml>.
Examples of XML declarations
Here are some examples of XML declarations.
XML declaration without parameters:
<?xml >
XML declaration with version definition:
XML/HTML CodeCopy content to clipboard Board
<?xml version="1.0">
XML declaration with all parameter definitions:
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
XML declaration with all parameter definitions using single quotes to wrap values:
<?xml version='1.0' encoding='iso-8859-1' standalone='no' ?>
The above is the detailed content of Detailed introduction to document and declaration usage in XML. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



This article will introduce how to solve the problem of insufficient memory or disk space to repage or print the document in Microsoft Word. This error usually occurs when users try to print a Word document. If you encounter a similar error, please refer to the suggestions provided in this article to resolve it. Insufficient memory or disk space to repage or print this document Word error How to resolve the Microsoft Word printing error "There is not enough memory or disk space to repage or print the document." Update Microsoft Office Close memory-hogging applications Change your default printer Start Word in safe mode Rename the NorMal.dotm file Save the Word file as another

Can XML files be opened with PPT? XML, Extensible Markup Language (Extensible Markup Language), is a universal markup language that is widely used in data exchange and data storage. Compared with HTML, XML is more flexible and can define its own tags and data structures, making the storage and exchange of data more convenient and unified. PPT, or PowerPoint, is a software developed by Microsoft for creating presentations. It provides a comprehensive way of

It is 395 words, which is 495. This article will show you how to add red lines in Word documents. Redlining a document refers to making modifications to the document so that users can clearly see the changes. This feature is very important when multiple people are editing a document together. What redline means Marking a document Redlining means using red lines or callouts to indicate changes, edits, or revisions to a document. The term was inspired by the practice of using a red pen to mark printed documents. Redline comments are widely used in different scenarios, such as clearly showing recommended changes to authors, editors, and reviewers when editing a document. Propose changes and modifications in legal agreements or contracts Provide constructive criticism and suggestions on papers, presentations, etc. How to give W

In recent years, with the continuous development of network technology, our lives are inseparable from various digital tools and the Internet. When processing documents, especially in writing, we often use word documents. However, sometimes we may encounter a difficult problem, that is, the hyperlink in the word document cannot be opened. This issue will be discussed below. First of all, we need to make it clear that hyperlinks refer to links added in word documents to other documents, web pages, directories, bookmarks, etc. When we click on these links, I

When you encounter a blank page issue when opening a Word document on a Windows 11/10 computer, you may need to perform repairs to resolve the situation. There are various sources of this problem, one of the most common being a corrupted document itself. Furthermore, corruption of Office files may also lead to similar situations. Therefore, the fixes provided in this article may be helpful to you. You can try to use some tools to repair the damaged Word document, or try to convert the document to another format and reopen it. In addition, checking whether the Office software in the system needs to be updated is also a way to solve this problem. By following these simple steps, you may be able to fix Word document blank when opening Word document on Win

Learn the os.Stdout.Write function in the Go language documentation to implement standard output. In the Go language, standard output is implemented through os.Stdout. os.Stdout is a variable of type *os.File, which represents the standard output device. In order to output content to standard output, you can use the os.Stdout.Write function. This article will introduce how to use the os.Stdout.Write function to implement standard output and provide specific code examples. os.

How to handle XML and JSON data formats in C# development requires specific code examples. In modern software development, XML and JSON are two widely used data formats. XML (Extensible Markup Language) is a markup language used to store and transmit data, while JSON (JavaScript Object Notation) is a lightweight data exchange format. In C# development, we often need to process and operate XML and JSON data. This article will focus on how to use C# to process these two data formats, and attach

Introduction to how to implement the basic usage of Workerman documents: Workerman is a high-performance PHP development framework that can help developers easily build high-concurrency network applications. This article will introduce the basic usage of Workerman, including installation and configuration, creating services and listening ports, handling client requests, etc. And give corresponding code examples. 1. Install and configure Workerman. Enter the following command on the command line to install Workerman: c
