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refname — The name of (one of) the subject(s) of a reference page
refname ::= (#PCDATA|action|application|classname|methodname|interfacename|exceptionname|ooclass|oointerface|ooexception|package|command|computeroutput|database|envar|errorcode|errorname|errortype|errortext|filename|function|guibutton|guiicon|guilabel|guimenu|guimenuitem|guisubmenu|hardware|interface|keycap|keycode|keycombo|keysym|literal|code|constant|markup|medialabel|menuchoice|mousebutton|option|optional|parameter|prompt|property|replaceable|returnvalue|sgmltag|structfield|structname|symbol|systemitem|uri|token|type|userinput|varname|nonterminal)*
               RefEntrys are small units of reference documentation
               describing a single topic. The RefName identifies
               the topic.  Often this is the name of the command or function
               that the reference page describes.
               
            
               Some reference pages describe a whole family of very closely related
               commands or functions.  In this case, a RefEntry will
               have multiple RefNames, one for each command or function.
               When a RefEntry has several RefNames, it is
               likely to have a RefDescriptor that identifies the 
               whole family of functions.
               
            
May be formatted inline or as a displayed block, depending on context.
                  Formatting reference pages may require a fairly sophisticated
                  processing system.  Much of the meta-information about a
                  reference page (its name, type, purpose, title, and
                  classification) is stored in wrappers near the beginning of
                  the RefEntry.
                  
               
Common presentational features, such as titles and running headers, may require data from several of these wrappers plus some generated text. Other formatting often requires that these elements be reordered.
                  
                  The InterfaceDefinition
                  element will be discarded in DocBook V4.0. It will no longer be available
                  in the content model of this element.
                  
               
The following elements occur in refname:
                  action, application, classname, code, command, computeroutput, constant, database, email, envar, errorcode, errorname, errortext, errortype, exceptionname, filename, function, guibutton, guiicon, guilabel, guimenu, guimenuitem, guisubmenu, hardware, interface, interfacename, keycap, keycode, keycombo, keysym, literal, markup, medialabel, menuchoice, methodname, mousebutton, nonterminal, ooclass, ooexception, oointerface, option, optional, package, parameter, prompt, property, replaceable, returnvalue, sgmltag, structfield, structname, symbol, systemitem, token, type, uri, userinput, varname.