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XML Data. XML Schema. XML Schema. “Valid” XML Adheres to basic structural requirements Also adheres to content-specific specification. DTD or XSD. XML Document. Validating XML Parser. Parsed XML. “Not valid”. XML Schema. XML Schema ( XSD ) Extensive language

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Xml data

XML Data

XML Schema


Xml data

XML Schema

“Valid” XML

Adheres to basic structural requirements

  • Also adheres to content-specific specification

DTD or XSD

XML

Document

Validating XML

Parser

Parsed XML

“Not valid”


Xml data

XML Schema

XML Schema (XSD)

  • Extensive language

  • Like DTDs, can specify elements, attributes,

    nesting, ordering, #occurrences

  • Also data types, keys, (typed) pointers, and more

  • XSD is written in XML

    This video: One “easy” example, language is vast