url - Universität zu Lübeck
url - Universität zu Lübeck
url - Universität zu Lübeck
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36 CHAPTER 2. FUNDAMENTALS<br />
1 <br />
2 <br />
3 <br />
4 item505<br />
5 DVD Recorder<br />
6 Paris , France<br />
7 1<br />
8 Cash<br />
9 <br />
10 This is a brand new DVD Recorder<br />
11 <br />
12 <br />
13 <br />
14 <br />
Figure 2.14: XUpdate append operation with complex content<br />
Deletion nodes<br />
The deletion of nodes is performed using XUpdate’s remove command. The node<br />
d to be deleted is selected with a normal XPath expression. Nodes that are descendants<br />
of d are deleted as well because without d they cannot be reached anymore<br />
from the document’s root.<br />
1 <br />
2 <br />
3 <br />
Figure 2.15: XUpdate remove operation<br />
Renaming nodes<br />
Nodes can be assigned a new name using the rename command. This modification<br />
does not affect the content of an element. In the example all description<br />
elements are renamed to desc.<br />
1 <br />
2 <br />
3 desc<br />
4 <br />
5 <br />
Figure 2.16: XUpdate rename operation<br />
Changing the content of nodes<br />
In contrast to the previous operation the update command changes the content<br />
of an element without affecting its name. The XUpdate expression in the example<br />
changes the price of all items that cost 14.99.
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