May 2018
Intermediate to advanced
680 pages
15h 54m
German
Content preview from XML -- Technologien, Grundlagen, Validierung, Auswertung
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xs:unique, xs:key, xs:keyref, xs:selector, xs:field
Auch m:n-Relationen, wie sie in RDBMS üblich sind, können in XML problemlos abgebildet werden. XML-Schema bietet hier mit xs:unique, xs:key und xs:keyref effiziente Lösungsansätze.
Der Vorteil: Hier können gegenseitige Abhängigkeiten zwischen Elementen bzw. Attributen im XML-Dokument definiert werden, die die Datenqualität beträchtlich erhöhen und die spätere Auswertung mit XPath sehr erleichtern, etwa über xsl:variable und xsl:key praktikable Ansätze. Siehe auch xsl:import-schema.
<?xml version="1.0" encoding="UTF-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified"> <xs:element name="Orte"> <xs:complexType> <xs:sequence> ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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