The varname element specifies a variable that must be supplied to a software application. The variable name element is very similar to the var element, but varname is available outside of syntax diagrams. This element is part of the DITA software domain, a special set of DITA elements designed to document software tasks, concepts and reference information.
See appendix for information about this element in OASIS document type shells.
+ topic/keyword sw-d/varname
<filepath> <varname>install-dir</varname>\projects\working\<varname>project-dir</varname> \source\<varname>filename</varname>.java </filepath>