ITP recognizes the text '__INC(filename)' (without the quotes) within a model document or result document and tries to replace this text with the contents of the file filename. The filename should be either a fully qualified path to the file or a filename relative to a user-defined set of directories. ITP will try to locate the file in a user-defined set of directories (refer to the paragraph Enabling the subdocuments mechanism for more information).
The text __INC(filename) can be written anywhere on a single line (even within comments) but cannot contain layout (spaces or line breaks) or word processor instructions (bold, italics or any other instructions) between the initial _ and the closing ). The filename cannot contain letters with special accents (such as ö, é or ñ).
ITP allows multiple levels of subdocuments.