Sometimes a parser can validate an XML document against a set of rules that limit the document to only a certain subset of tags. The two most popular mechanisms for parsing XML documents are to create a Document Object Model (DOM) tree or to use the event-based Simple API for XML (SAX) model.An XML document can be validated against a DTD (the set of rules that define the type and structure of the XML tags) or an XML schema.When using this XML Schema to validate the input XML document, the following error gets reported: ) as defined below has been used in the code examples to validate the input document.To highlight that the DTD has been used for the validation, the title attribute in the input document has a value which is not allowed according to this DTD. Map Path("~/Other Agencies/DTDschema.dtd")); Xml Reader reader1 = Xml Reader. Map Path("~/Other Agencies/otherhomes.xml"), settings); And then I`m getting an XMLException: "For security reasons DTD is prohibited in this XML document. An XML document in which every opening tag has a closing tag is said to be well formed.
The input document contains an extra attribute which has not been defined in the XML Schema, this shows that the XML Schema has been used for the validation.The two common programmatic XML APIs (SAX and DOM) are now built into the core Java API (as of J2SE 1.4.0).The SAX parser is an event-driven parser in which the parser fires off events when it encounters XML elements.Users write content handlers, which they can register with the parser.A content handler is like an event listener and can take appropriate action upon encountering, say, a particular XML tag.