'Bars beer' diaporamas de présentation

XML Query Languages XPATH XQUERY

589 views • 34 slides

XQuery

XQuery. Values FLWR Expressions Other Expressions. XQuery. XQuery extends XPath to a query language that has power similar to SQL. XQuery is an expression language. Like relational algebra --- any XQuery expression can be an argument of any other XQuery expression.

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XML Query Languages

XML Query Languages. XPATH XQUERY. XPATH and XQUERY. XPATH is a language for describing paths in XML documents. Really think of the semistructured data graph and its paths. XQUERY is a full query language for XML documents with power similar to OQL. Example DTD. <!DOCTYPE Bars [

372 views • 26 slides

XML Query Languages

XML Query Languages. XPATH XQUERY (non in programma). XPATH and XQUERY. XPATH is a language for describing paths in XML documents. Really think of the semistructured data graph and its paths. XQUERY is a full query language for XML documents with power similar to OQL. Example DTD.

346 views • 26 slides

XPath

XPath. Path Expressions Conditions. Paths in XML Documents. XPath is a language for describing paths in XML documents. Really think of the semistructured data graph and its paths. Example DTD. <!DOCTYPE BARS [ <!ELEMENT BARS (BAR*, BEER*)> <!ELEMENT BAR (PRICE+)>

326 views • 18 slides