XML Developer XML DeveloperXML BasicsSyntax and StructureElements and AttributesNamespacesDocument Type Definitions (DTD)XML Schema Definition (XSD)XML ProcessingXML Parsers (DOM, SAX, StAX)XPathXSLT (Extensible Stylesheet Language Transformations)XQueryXML ValidationXML TechnologiesSOAP (Simple Object Access Protocol)XML-RPCRESTful Web Services with XMLWeb Services Description Language (WSDL)XML Binding (e.g., JAXB)XML APIs and LibrariesXML DOM APIXML SAX APIXML StAX APIXML Parsing Libraries (e.g., lxml, libxml2)XML Transformation Libraries (e.g., XSLT, XQuery)XML DatabasesXML Database ConceptsQuerying XML DatabasesXML IndexingXML Database Management Systems (e.g., eXist-db, MarkLogic)XML IntegrationXML Data Exchange Formats (e.g., JSON, CSV)XML in Database SystemsXML in Web ApplicationsXML and Content Management Systems (CMS)XML Best PracticesWell-formed XML DocumentsValid XML DocumentsXML Naming ConventionsXML Document VersioningXML Performance Optimization