Validating xml data with xmlreader
If you want to use SAX, you'll need all of the following: Most Java/XML tools distributions include SAX2 and a parser using it.Most web applications servers use it for their core XML support.
extends the set of allowed characters to include all the above, plus the remaining characters in the range U 0001–U 001F.Generally, strings that constitute markup either begin with the character An element is a logical document component that either begins with a start-tag and ends with a matching end-tag or consists only of an empty-element tag.The characters between the start-tag and end-tag, if any, are the element's content, and may contain markup, including other elements, which are called child elements.Several schema systems exist to aid in the definition of XML-based languages, while programmers have developed many application programming interfaces (APIs) to aid the processing of XML data.The essence of why extensible markup languages are necessary is explained at Markup language (for example, see Markup language § XML) and at Standard Generalized Markup Language.Hundreds of document formats using XML syntax have been developed, including RSS, Atom, SOAP, SVG, and XHTML. are based on XML and the rich features of the XML schema specification.
XML-based formats have become the default for many office-productivity tools, including Microsoft Office (Office Open XML), Open and Libre Office (Open Document), and Apple's i Work. Apple has an implementation of a registry based on XML. Many of these standards are quite complex and it is not uncommon for a specification to comprise several thousand pages.
The processor (as the specification calls it) is often referred to colloquially as an XML parser.
The characters making up an XML document are divided into markup and content, which may be distinguished by the application of simple syntactic rules.
The message exchange format is standardised as an XML schema (XSD). XML has come into common use for the interchange of data over the Internet.
IETF RFC:3023, now superseded by RFC:7303, gave rules for the construction of Internet Media Types for use when sending XML. Further guidelines for the use of XML in a networked context appear in RFC 3470, also known as IETF BCP 70, a document covering many aspects of designing and deploying an XML-based language.
The SAX driver will signal the start and end of elements in much the same way, except that it will also pass some parameters to the start Element and end Element methods: contains the raw XML 1.0 name, which you must use for all elements that don't have a namespace URI. You may also work with documents that have some elements (and attributes) with namespaces, and some without.