The "use" pragma is for declaring variables and defining clone templates in an external BLUE-PHRASE file.
The syntax for the use pragma consists of:
An exclamation point !
The keyword use
A sourceref containing the name of the external file to use.
The contents of the external file are parsed and placed in memory for use by the BLUE-PROCESSOR, but are never emitted to the final document.
The target may be an absolute path specifying the target from the file system's root, or a relative path, specifying the target using dot notation (.\filename.blue) or dot-dot notation (..\other-dir\filename.blue).
Here is what a use pragma looks like within the body of a manuscript.