man.string.subst.map rtf man.string.subst.map Specifies a set of string substitutions The man.string.subst.map parameter contains a map that specifies a set of string substitutions to perform over the entire roff source for each man page, either just before generating final man-page output (that is, before writing man-page files to disk) or, if the value of the man.charmap.enabled parameter is non-zero, before applying the roff character map. You can use man.string.subst.map as a “lightweight” character map to perform “essential” substitutions -- that is, substitutions that are always performed, even if the value of the man.charmap.enabled parameter is zero. For example, you can use it to replace quotation marks or other special characters that are generated by the DocBook XSL stylesheets for a particular locale setting (as opposed to those characters that are actually in source XML documents), or to replace any special characters that may be automatically generated by a particular customization of the DocBook XSL stylesheets. Do you not change value of the man.string.subst.map parameter unless you are sure what you are doing. First consider adding your string-substitution mappings to either or both of the following parameters: man.string.subst.map.local.pre applied before man.string.subst.map man.string.subst.map.local.post applied after man.string.subst.map By default, both of those parameters contain no string substitutions. They are intended as a means for you to specify your own local string-substitution mappings. If you remove any of default mappings from the value of the man.string.subst.map parameter, you are likely to end up with broken output. And be very careful about adding anything to it; it’s used for doing string substitution over the entire roff source of each man page – it causes target strings to be replaced in roff requests and escapes, not just in the visible contents of the page. The string-substitution map contains one or more ss:substitution elements, each of which has two attributes: oldstring string to replace newstring string with which to replace oldstring It may also include XML comments (that is, delimited with "<!--" and "-->").