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tertiary — A tertiary word or phrase in an index term
tertiary ::= (#PCDATA|footnoteref|xref|biblioref|abbrev|acronym|citation|citerefentry|citetitle|citebiblioid|emphasis|firstterm|foreignphrase|glossterm|termdef|footnote|phrase|orgname|quote|trademark|wordasword|personname|link|olink|ulink|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|anchor|author|authorinitials|corpauthor|corpcredit|modespec|othercredit|productname|productnumber|revhistory|remark|subscript|superscript|inlinegraphic|inlinemediaobject)*
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                         Name  | 
                     
                         Type  | 
                     
                         Default  | 
                  
| sortas | CDATA | None | 
               Tertiary contains a third-level word or phrase in an
               IndexTerm.  The text of a Tertiary term
               is less significant than the Primary and
               Secondary terms for sorting and display purposes.
               
            
               DocBook does not define any additional levels. You cannot use
               IndexTerms to construct indexes with more than three
               levels without extending the DTD.
               
            
               In IndexTerms, you can only have one primary,
               secondary, and tertiary term. If you want to index multiple
               tertiary terms for the same primary and secondary, you must
               repeat the primary and secondary in another
               IndexTerm. You cannot place several
               Tertiarys in the same primary.
               
            
Suppressed. This element provides data for processing but is not rendered in the primary flow of text.
                  
                  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 tertiary:
                  abbrev, acronym, action, anchor, application, author, authorinitials, biblioref, citation, citebiblioid, citerefentry, citetitle, classname, code, command, computeroutput, constant, corpauthor, corpcredit, database, email, emphasis, envar, errorcode, errorname, errortext, errortype, exceptionname, filename, firstterm, footnote, footnoteref, foreignphrase, function, glossterm, guibutton, guiicon, guilabel, guimenu, guimenuitem, guisubmenu, hardware, inlinegraphic, inlinemediaobject, interface, interfacename, keycap, keycode, keycombo, keysym, link, literal, markup, medialabel, menuchoice, methodname, modespec, mousebutton, nonterminal, olink, ooclass, ooexception, oointerface, option, optional, orgname, othercredit, package, parameter, personname, phrase, productname, productnumber, prompt, property, quote, remark, replaceable, returnvalue, revhistory, sgmltag, structfield, structname, subscript, superscript, symbol, systemitem, termdef, token, trademark, type, ulink, uri, userinput, varname, wordasword, xref.
               
                        SortAs specifies the string by which the 
                        element's content is to be sorted. If unspecified, the proper content
                        is used.
                        
                     
indexentry, indexterm, primary, primaryie, secondary, secondaryie, see, seealso, seealsoie, seeie, tertiaryie.