May 2018
Intermediate to advanced
680 pages
15h 54m
German
Content preview from XML -- Technologien, Grundlagen, Validierung, Auswertung
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Versionierung
Dass Datenstrukturen sich ändern können, ist normal. Normal ist auch, dass die Folgeprogrammierung der geänderten Sachlage anzupassen ist. Änderungen zu blockieren, um sich die aufwendige Anpassung der Folgeprogrammierung zu ersparen, ist auf Dauer kaum durchzuhalten. Daher ist eine klare Versionierung geänderter XML-Datenstrukturen von zentraler Bedeutung.
Grundsätzlich gibt es drei Möglichkeiten der Versionierung:
- Versionierung in den Namespaces.
- Versionierung über Element- oder Attributnamen.
- Versionierung über Attribut "@version".
Versionierung über Namespaces
Häufiger Anlass für Ärger und Stress ist, wenn die Versionierung der XML-Inputdokumente direkt in die Namespaces eingearbeitet ist. Beispiel:
<XSLSchulung xmlns="www.wilfried-grupe.de/XSLSchulung/2018" ...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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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.