Complete XML Guide
Work with XML, convert it to JSON, and understand differences with modern JSON.
XML (eXtensible Markup Language) was the predominant standard for data exchange before JSON gained popularity. It remains relevant in legacy systems, SOAP services, enterprise configurations, and many industrial protocols. XML is more verbose than JSON but offers advanced features like namespaces, attributes, XSD schemas for strict validation, and metadata support. SOAP services use XML exclusively with structured envelopes that define operations, parameters, and responses. Formatting unreadable XML is essential for maintaining legacy systems, as a single indentation error can break XML parsers. Converting XML to JSON facilitates integrating legacy systems with modern applications using REST APIs. Namespaces allow avoiding name conflicts when combining XML documents from different sources. Attributes in XML represent element metadata, while in JSON everything is values. Migrating XML to JSON requires deciding how to map attributes (often converted to properties with @ prefix).
Real-world use cases
- •Integrate SOAP services with modern applications by converting XML responses to JSON
- •Migrate data from legacy systems using XML to current JSON-based technologies
- •Format unreadable XML from enterprise configurations to facilitate maintenance
- •Work with bank and government APIs that still require XML-based protocols
- •Validate XML documents against XSD schemas to ensure compliance with industry standards