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File Inclusion
Split up a large doc or include bits of ‘boiler plate’
e.g., Author element blocks, reference elements
Can be used as an alternative to external entities, BUT...
WARNING: XSLT transformations don’t understand ‘include’

Remember file names may be case sensitive in some OSs!
Content interpreted immediately
Other directives in same PI may cause unexpected effects
Finding the included file if the name is ‘relative’...
If XML_LIBRARY environment variable is set
Gives search path of possible locations for ‘relative’ file names
Directory separator is ‘usual’ one for OS (; or :)
Otherwise: In the directory where the file with the PI is found
See the README file for ways to set up XML_LIBRARY
PPT Version