May 2018
Intermediate to advanced
680 pages
15h 54m
German
Content preview from XML -- Technologien, Grundlagen, Validierung, Auswertung
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XQuery: Generierung von 3erGruppen
Eine etwas komplexere XQuery-Aufgabe ist die nach Einkommen absteigend sortierte, in Dreiergruppen angeordnete und nummerierte Ausgabe von Vorname und Wohnort aller Menschen im Quelldokument.
$allemenschen ist die Liste aller Menschen im Quelldokument mit Vorname und Wohnort, nach Gehalt absteigend sortiert (Casting als xs:decimal), noch ohne Position.
$numallemenschen fügt der sortierten Liste $allemenschen eine Nummerierung hinzu.
$jederdritte generiert mit dem WHERE eine neue Liste mit jedem dritten Element aus $numallemenschen. Dies ist Ausgangsbasis für eine Iteration über jeden Node in $jederdritte, jeweils wird ein Element gruppe mit einem Attribut nr erzeugt. Innerhalb dieser Gruppe wird der vorletzte, ...
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