• Introdução ao standard XML (  http://www.w3schools.com/xml/default.asp )
• Introdução ao standard XML Schema (  http://www.w3schools.com/schema/default.asp )
• Introdução ao standard XPath (  http://www.w3schools.com/xpath/default.asp )
• Introdução ao standard XSLT (  http://www.w3schools.com/xsl/default.asp )
• Introdução ao standard XQuery (  http://www.w3schools.com/xquery/default.asp )
• Introdução e referência para o standard XQuery Update (  http://xqilla.sourceforge.net/XQueryUpdate )
• Introdução e referência para o standard XQuery Full-Text (  http://www.xmlmind.com/_tutorials/XQueryFullText/XQueryFullText.pdf )

• XPath/XSLT/XQuery/regexp quick reference cards (  http://www.mulberrytech.com/quickref/ )
• XML Schema quick reference card (  http://www.xml.dvint.com/docs/SchemaStructuresQR-1.pdf ) 
  
• XML Schema Type Hierarchy (  http://dret.net/lectures/xml-fall08/img/xsd-type-hierarchy.gif ) 
  
• Funções XPath (  http://www.w3schools.com/xpath/xpath_functions.asp )
• Elementos XSLT (  http://www.w3schools.com/xsl/xsl_w3celementref.asp )
• XQuery (  http://www.w3schools.com/xquery/xquery_reference.asp )
• Regular expressions syntax (  http://www.w3.org/TR/xpath-functions/#regex-syntax )

Exemplos

• Exemplos XML (  http://www.w3schools.com/xml/xml_examples.asp )
• Exemplos XML Schema (  http://www.w3schools.com/schema/schema_example.asp )
• Integridade referencial com XML Schema (  http://msdn.microsoft.com/en-us/library/d8wa0tw7(v=vs.71).aspx )
• Exemplos XSLT (  http://www.w3schools.com/xsl/xsl_examples.asp )
• Exemplos XQuery (  http://www.w3schools.com/xquery/xquery_example.asp )
• The XQuery Examples Collection Wikibook (  http://en.wikibooks.org/wiki/XQuery )