HOWTO: Include XML in Another XML File

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July 20, 2010

HOWTO: Include XML in Another XML File

By Michael Marr

It is a common programming tool to include code from a separate file. Sometimes, this code is required to be included at a separate spot, and other times it can be included anywhere. However, the advantage of separating code and/or data into separate files is clear. When a change to code in one file is made, it is automatically applied to all instances where it is included.

It is plausible that we might have many XML files that should combine to make one master XML file, as each individual XML file may need to be manipulated by a program separately from the others. In this scenario, we would want our master XML file to be able to include these external files. We can accomplish this in XML with the ENTITY declaration. Let's say we have the following two XML files:

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