The 
                  emph element represents an author's emphasis.
                  
               
               Emphasis is not restricted to italicized text, but may constitute any of a variety of typographical or styling means used
                  to distinguish text, such as bolding, underlining, coloring, etc.
               
               Nested 
                  emph elements indicate extra emphasized segments within an emphasized segment.
                  
               
             
            Allowed parents
            abbr, 
               d:about, 
               address, 
               annoref, 
               annotation (block variant), 
               annotation (phrase variant), 
               block, 
               byline, 
               caption, 
               citation (block variant), 
               citation (phrase variant), 
               code, 
               dateline, 
               definition, 
               description (block variant), 
               description (phrase variant), 
               description (text variant), 
               emph (phrase variant), 
               emph (text variant), 
               expansion, 
               h, 
               hd, 
               item, 
               ln (ln variant), 
               ln (code variant), 
               lnum, 
               d:longdesc, 
               meta, 
               name, 
               num, 
               object (block variant), 
               object (phrase variant), 
               object (text variant), 
               p, 
               quote (block variant), 
               quote (phrase variant), 
               its:rb, 
               ref, 
               its:rt, 
               s, 
               d:simplifiedLanguageDescription, 
               span (phrase variant), 
               span (text variant), 
               sub, 
               d:summary, 
               sup, 
               td, 
               term, 
               th, 
               time, 
               d:tour, 
               w and 
               wpart
               
            
            Allowed children
            This element may contain text.
            
            This element may contain the following children: emph, 
               object, 
               its:ruby, 
               span, 
               sub and 
               sup
               
            
            Content model and additional requirements
            
               optional attributes: 
@about, 
                  
@by, 
                  
@class, 
                  
@content, 
                  
@datatype, 
                  
@desc, 
                  
@its:dir, 
                  
@its:translate, 
                  
@property, 
                  
@rel, 
                  
@resource, 
                  
@rev, 
                  
@role, 
                  
@typeof, 
                  
@xml:base, 
                  
@xml:id, 
                  
@xml:lang and 
                  
@xml:spaceone or more of 
                  
                  a choice of 
                     or text
end of choice 
                  
                
               Note that in addition to restrictions presented in the content model  above, 
                  					use of this element must also respect the following requirement:
                  
                     - The 
                        emphelement must neither be empty nor contain only whitespace.
Such requirements take precedence over any conflicting statements in the
                     						content model or in the lists above of allowed children and parents.
                  
                
            Variants
            This element exists in 2 variants. The other variant is the phrase variant.
            Namespace
            http://www.daisy.org/ns/z3998/authoring/