XML Data Introduction, Well-formed XML.

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Presentation transcript:

XML Data Introduction, Well-formed XML

Extensible Markup Language (XML) Well-Formed XML Extensible Markup Language (XML) Standard for data representation and exchange Document format similar to HTML Tags describe content instead of formatting Also streaming format

Basic constructs Tagged elements (nested) Attributes Text Well-Formed XML Basic constructs Tagged elements (nested) Attributes Text

Relational Model versus XML Well-Formed XML Relational Model versus XML Relational XML Structure Schema Queries Ordering Implementation

Adheres to basic structural requirements Well-Formed XML “Well-Formed” XML Adheres to basic structural requirements Single root element Matched tags, proper nesting Unique attributes within elements

Adheres to basic structural requirements Well-Formed XML “Well-Formed” XML Adheres to basic structural requirements Single root element Matched tags, proper nesting Unique attributes within elements XML Document XML Parser Parsed XML “Not well-formed”

Use rule-based language to translate to HTML Well-Formed XML Displaying XML Use rule-based language to translate to HTML Cascading stylesheets (CSS) Extensible stylesheet language (XSL)

Use rule-based language to translate to HTML Well-Formed XML Displaying XML Use rule-based language to translate to HTML Cascading stylesheets (CSS) Extensible stylesheet language (XSL) Rules XML Document (data) HTML Document (look at) CSS/XSL interpreter

Extensible Markup Language (XML) Well-Formed XML Extensible Markup Language (XML) Standard for data representation and exchange Formal specification is enormous; we cover most important components