IntelliJ IDEA brings powerful support for XML that includes structure validation, formatting (Ctrl+Alt+L) and indentation (Ctrl+Alt+I according to the XML code style, importing unbound namespaces, viewing code structure, unwrapping and removing ...

August 6, 2026 - Use this page to configure formatting options for XML files.

Editing and statement completion in XML files is made easier by using XSDs (XML Schema Definitions). This topic helps you configure IntelliJ to find and use these files.

This article is intended for plugin writers who create custom web server integrations, or some UI for easy XML editing. It describes the Document Object Model (DOM) in IntelliJ Platform - an easy way to work with DTD or Schema-based XML models.

Working on an XML document, for having additional code assistance such as error highlighting or completion, you need to specify an XML schema (e.g. XSD or DTD). In the previous versions of IntelliJ IDEA, you had to work with Schemas and DTDs section in Settings or fetch schema from external resource…

January 30, 2026 - The XML refactoring support is provided by the Refactor-XML plugin that is bundled with the IDE and enabled by default.

November 23, 2015 - I'm using IDEA 15.0.1 Ultimate Thanks for any pointers., ... Right in the main menu: "Code => Reformat Code" or just Ctrl-Alt-L Or "Help => Find Action" (which is Ctrl-Shift-A), then type "format" ...

IntelliJ Platform Explorer is a search tool for browsing Extension Points inside existing implementations of open-source IntelliJ Platform plugins

1 month ago - <root xmlns="http://www.example.org" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.example.org/xsds/example.xsd"> ... If the referenced URL or the namespace URI is not recognized, it's marked as an error. To solve the problem: Place the caret at the referenced URL and press Alt+Enter. From the list of suggested options, select one of the following: Fetch external resource. IntelliJ IDEA downloads the referenced file and associates it with the URL (or the namespace URI).

An XSD (XML Schema Definition) is required for running structure validation checks on a Web content file. IntelliJ IDEA can scan any XML file for the existing elements and attributes and generate a Schema for it.

August 18, 2023 - <fileType fieldName="INSTANCE" fileNames="content.xml" implementationClass="com.intellij.ide.highlighter.XmlFileType" name="XML"/>

January 24, 2014 - When XML document is opened in the Editor, use standard "Structure" (Alt-7 by default) Tool Window.

June 17, 2024 - With IntelliJ IDEA, you can get a Java representation of an XML Schema, generate an XML Schema from a Java class, and unmarshal XML instance documents into Java content trees and vice versa.

Open the Marketplace tab, find ... Open the necessary class in the editor. In the main menu, go to Tools | XML Actions | Generate XML Schema From Java Using JAXB....

February 10, 2026 - The catalog.xml files contain the information on how to resolve various PUBLIC and SYSTEM identifiers during XML processing.

April 12, 2023 - I created a free XML viewer applet that runs in the Applet Runner plug-in for IntelliJ IDEA and other JetBrains IDE such as Android Studio. You...

February 10, 2026 - In this area, choose the XSD (XML Schema Definition) Schema to validate XML files.

<!DOCTYPE post PUBLIC "//GOOGLE/ > 2. should I save them in memory as a Map (or whatever type) to keep indexes of files for fast looking needed XML or perform search exact XML every time using FileBaseIndex and iterate them again and again ... scope = GlobalSearchScopesCore.directoriesScope(module.getProject(), true, resourceRoots.toArray(VirtualFile.EMPTY_ARRAY)) You can use API like com.intellij.psi.search.FileTypeIndex#processFiles(com.intellij.openapi.fileTypes.FileType, com.intellij.util.Processor<? super com.intellij.openapi.vfs.VirtualFile>, com.intellij.psi.search.GlobalSearchScope) to perform the filtering according to DocType or any other criteria.