May 2018
Intermediate to advanced
680 pages
15h 54m
German
Content preview from XML -- Technologien, Grundlagen, Validierung, Auswertung
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FLOWR
XQuery bietet komfortable Unterstützung für erweiterte Bedingungsprüfungen (every/some mit satisfies) sowie präzise Typdefinitionen auf der Basis simpler XML-Schema-Datentypen (castable, xs:decimal, xs:integer etc.).
Das folgende XQuery-Script prüft zunächst, ob gezielt adressierte Werte als xs:decimal gecastet werden können. In diesem Fall wird ein for-Loop gestartet, in dem lokale Variable deklariert werden; das im Arbeitsspeicher generierte Ergebnis wird sortiert und gefiltert, bevor die Einzelinformationen sichtbar werden.
Bei der Definition von $ausg wird normalerweise jeder Einzelwert von //Kauf/Gesamt als double gecastet. Durch die Typzuweisung von xs:decimal müssen auch alle Einzelwerte als xs:decimal gecastet werden. Ein Casting ...
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