This tells XMLBlueprint to validate the XML Document against XML Schema "book.xsd".
In this case, the XML Schema is to be found in the same folder as the XML Document.
The DTD is retrieved automatically based on the DOCTYPE of the parsed document.
All you have to do is use a parser that has DTD validation enabled: option, which loads the DTD and weaves attribute default values into the document.
To be notified of validation errors in an XML document, the following must be true: It is helpful to start by defining the constants you will use when configuring the factory.
These are the same constants you define when using XML Schema for SAX parsing, and they are declared at the beginning of the Because JAXP-compliant parsers are not namespace-aware by default, it is necessary to set the property for schema validation to work.
W3C_XML_SCHEMA_NS_URI); // load a WXS schema, represented by a Schema instance Source schema File = new Stream Source(new File("my Schema.xsd")); Schema schema = Schema(schema File); // create a Validator instance, which can be used to validate an instance document Validator validator = Validator(); // validate the DOM tree try catch (SAXException e) on a parser factory.
The former technique will cause parsers to use the new validation API; the latter will cause parsers to use their own internal validation facilities.
Many Java XML APIs provide mechanisms to validate XML documents, the JAXP API can be used for most of these XML APIs but subtle configuration differences exists.The Error Handler used for the examples is a very simple one which reports the error to and continues until the XML document has been fully parsed or until a fatal-error has been reported.Namespaces have been introduced to XML after the first specification of XML had received the official W3C Recommendation status.All three provide identical APIs in lxml, represented by validator classes with the obvious names.lxml also provides support for ISO-Schematron, based on the pure-XSLT skeleton implementation of Schematron: There is also basic support for The parser in lxml can do on-the-fly validation of a document against a DTD or an XML schema.