Validating xml against xsd java
For example, it can't update the data in memory and return the updated data to the XML file.
In the DOM approach, the parser creates a tree of objects that represents the content and organization of data in the document. The application can then navigate through the tree to access the data it needs, and if appropriate, manipulate it.
Here we will see how we can write XML file in java using St AX Iterator based API (XMLEvent Writer).
XML and Java technology are recognized as ideal building blocks for developing Web services and applications that access Web services.
Both of these parsers are provided by Java API for XML Processing (JAXP).
Java developers can invoke a SAX or DOM parser in an application through the JAXP API to parse an XML document -- that is, scan the document and logically break it up into discrete pieces.
An XML document does not have to have a schema, but if it does, it must conform to that schema to be a valid XML document.
JAXB requires that the XML document you want to access has a schema, and that schema is written in the W3C XML Schema Language (see the box "Why W3C XML Schema Language? Assume, for this example, that the Why W3C XML Schema Language?
One way to do this, perhaps the most typical way, is through parsers that conform to the Simple API for XML (SAX) or the Document Object Model (DOM).The parsed content is then made available to the application.In the SAX approach, the parser starts at the beginning of the document and passes each piece of the document to the application in the sequence it finds it. The application can take action on the data as it gets it from the parser, but it can't do any in-memory manipulation of the data.Schema: A schema is an XML specification that governs the allowable components of an XML document and the relationships between the components.For example, a schema identifies the elements that can appear in an XML document, in what order they must appear, what attributes they can have, and which elements are subordinate (that is, are child elements) to other elements.