Lección 1
What Is XML? en español
Guía en español para xml what is xml: Understand XML structure and common developer use cases.
Este contenido todavía no está disponible en español. Se muestra la versión en English mientras completamos la localización.
XML (Extensible Markup Language) describes structured data with nested elements, optional attributes, and human-readable tags. Unlike JSON's braces, XML uses opening and closing tags:
<project>
<artifactId>demo-app</artifactId>
</project>
Where developers still meet XML
- Maven / Gradle POM files for Java builds
- Android manifests and resource XML
- SVG vector graphics embedded in apps or docs
- Sitemaps, RSS/Atom feeds, and legacy enterprise configs
JSON and YAML dominate new APIs, but XML remains entrenched in mobile, Java, and publishing pipelines.
Well-formed vs valid
- Well-formed — tags match, attributes are quoted, one root element. Parsers require this.
- Valid (optional) — conforms to a schema such as XSD. Many day-to-day tools only check well-formed syntax.
DevCove's formatter focuses on well-formed XML you can prettify, validate, and minify locally.
Key takeaway
XML is a text envelope for structured data. The next lessons cover namespaces, Maven/Android patterns, and how to debug parse failures quickly.