XML Validation

XML validated against a DTD or a Schema is a Valid XML.

XML Validation

XML Validation

     

XML with correct syntax is Well Formed XML.

XML validated against a DTD or a Schema  is a Valid XML.

Well Formed XML Documents

A "Well Formed" XML document has correct XML syntax.

A "Well Formed" XML document is a document that conforms to the XML syntax rules that were described in the previous chapters:

  • XML documents must have a root element
  • XML elements must have a closing tag
  • XML tags are case sensitive
  • XML elements must be properly nested
  • XML attribute values must always be quoted

 

<?xml version="1.0" encoding="ISO-8859-1"?>
<E-mail>
<To>Rohan</To>
<From>Amit</From>
<Subject>Surprise....</Subject>
<Body>Be ready for a cruise...i will catch u  tonight</Body>
</E-mail>

Valid XML Documents:

A "Valid" XML document is a "Well Formed" XML document, which also conforms to the rules of a Document Type Definition (DTD) or a XML Schema .

The following xml document is validated against a DTD , notice the highlighted text. 

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE e-mail SYSTEM "InternalE-mail.dtd">
<E-mail>
<To>Rohan</To>
<From>Amit</From>
<Subject>Surprise....</Subject>
<Body>Be ready for a cruise...i will catch u  tonight</Body>
</E-mail

XML DTD

A DTD defines the legal elements of an XML document. The purpose of a DTD is to define the legal building blocks of an XML document. It defines the document structure with a list of legal elements.

XML Schema 

XML Schema is an XML based alternative to DTD .W3C supports an alternative to DTD called XML Schema.

     

Tutorials

  1. JDOM Introduction
  2. Creating DOM Child Elements
  3. Java Java DOM Tutorial Tutorial
  4. XML Tutorials
  5. XML: An Introduction
  6. XML: An Introduction - Brief History
  7. Comparing XML with HTML
  8. XML Syntax Rules
  9. XML Elements
  10. XML Attributes
  11. XML Validation
  12. DTD:Document Type Definition
  13. DTD - XML Constituent
  14. DTD-Elements
  15. DTD-Attributes
  16. DTD-Entities
  17. Introduction to XML Schema
  18. Designing XML Schema
  19. XSD Simple Elements
  20. XSD Attributes
  21. XML Related Technologies: An overview
  22. An Overview of the XML-APIs
  23. The JAXP APIs
  24. The Simple API for XML (SAX) APIs
  25. The Document Object Model (DOM) APIs
  26. The XML Style Sheet Translation (XSLT) APIs
  27. XML Well-Formed Verifier
  28. Get XML Elements
  29. XML Parsers
  30. Get Data From the XML File
  31. XML Count Elements
  32. XML Error Checking and Locating
  33. Getting The XML Root Element
  34. To Count The Elements in a XML File
  35. Searching an Element in the given XML Document
  36. XML Well-Formed-ness
  37. To Count XML Element
  38. Regenerating XML file
  39. Create - XML File (Document)
  40. XML Error checker and locater (DOM)