It is possible to reuse parts of template documents in other templates. For example, the client may want to store the header and footer of the templates in a separate file in order to make it easier to change it.
First of all you need to define a fragment by creating a docx document. The content of the document will be used to include in the main document.
Then you can include a fragment by writing {<i>% include "Fragment Name" %</i>} in the document.
The fragment name must be a string literal meaning it can not come from a variable.