Including other XML files
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Limitations
The use of the <include ...>
XML tag is allowed almost everywhere, but not arbitrarily anywhere.
You can use it:
In the main
*.world.xml
world definition file, anywhere as a direct child node of the top-level<world>
tag.As a child of these XML tags: -
<vehicle>
-<vehicle:class>
-<block:class>
As a top level entry in any other included file.