The toc 
                  aside element represents a separate block of information in a 
                  
                     toc (section) table of contents
                      from the main sections and entries.
                  
               
               The toc 
                  aside element typically represents information in the margins of a print table of contents.
                  
               
             
            Usage Example
<toc>
    <entry>
        Chapter 1
        <ref>1</ref>
        <block>
            <aside role="marginalia" xml:id="c1_quizzes">
                <hd>Quizzes</hd>
                <toc>
                    <entry>Quiz 1 <ref>14</ref></entry>
                    <entry>Quiz 2 <ref>27</ref></entry>
                </toc>
            </aside>
        </block>
    </entry>
    …
</toc>
    Allowed parents
            block, 
               section and 
               toc
               
            
            Allowed children
            This element may contain text.
            
            This element may contain the following children: abbr, 
               address (block variant), 
               address (phrase variant), 
               annoref, 
               annotation (block variant), 
               annotation (phrase variant), 
               aside, 
               block, 
               ssml:break, 
               caption, 
               char, 
               citation (block variant), 
               citation (phrase variant), 
               code (block variant), 
               code (phrase variant), 
               d, 
               definition, 
               description, 
               d:description, 
               emph (text variant), 
               emph (phrase variant), 
               expansion, 
               xforms:group, 
               hd, 
               xforms:input, 
               rend:linebreak, 
               list, 
               ln, 
               m:math, 
               name, 
               note (block variant), 
               note (phrase variant), 
               noteref, 
               num, 
               object (block variant), 
               object (text variant), 
               object (phrase variant), 
               p, 
               pagebreak, 
               ssml:phoneme (text variant), 
               ssml:phoneme (phrase variant), 
               ssml:prosody (text variant), 
               ssml:prosody (phrase variant), 
               quote (block variant), 
               quote (phrase variant), 
               xforms:range, 
               ref, 
               xforms:repeat, 
               its:ruby, 
               s, 
               ssml:say-as (text variant), 
               ssml:say-as (phrase variant), 
               xforms:secret, 
               sel:select (Block variant), 
               sel:select (Phrase variant), 
               xforms:select, 
               xforms:select1, 
               span (text variant), 
               span (phrase variant), 
               sub, 
               ssml:sub (text variant), 
               ssml:sub (phrase variant), 
               sup, 
               table, 
               term, 
               xforms:textarea, 
               time, 
               toc, 
               ssml:token (text variant), 
               ssml:token (phrase variant), 
               transition, 
               verse and 
               w
               
            
            Content model and additional requirements
            
               optional attributes: 
@about, 
                  
@by, 
                  
@class, 
                  
@content, 
                  
@continuation, 
                  
@datatype, 
                  
@desc, 
                  
@its:dir, 
                  
@its:translate, 
                  
@property, 
                  
@rel, 
                  
@resource, 
                  
@rev, 
                  
@role, 
                  
@sel:selid, 
                  
@ssml:onlangfailure, 
                  
@typeof, 
                  
@xml:base, 
                  
@xml:id, 
                  
@xml:lang and 
                  
@xml:space 
               a mix of
                  
                  • 
a choice of
                     
                     either 
one or more of 
                        
                        any of the 24 elements: 
address, 
annotation, 
aside, 
block, 
caption, 
citation, 
code, 
d:description, 
description, 
hd, 
list, 
m:math, 
note, 
object, 
p, 
pagebreak, 
quote, 
sel:select, 
ssml:break, 
table, 
transition, 
verse, 
xforms:group and 
xforms:repeat 
                        
                      
                     
                     or 
one or more of 
                        
                        a choice of either one of the 53 elements: 
abbr, 
address, 
annoref, 
annotation, 
char, 
citation, 
code, 
d, 
definition, 
emph, 
emph, 
expansion, 
its:ruby, 
ln, 
m:math, 
name, 
note, 
noteref, 
num, 
object, 
object, 
pagebreak, 
quote, 
ref, 
rend:linebreak, 
s, 
sel:select, 
span, 
span, 
ssml:break, 
ssml:break, 
ssml:phoneme, 
ssml:phoneme, 
ssml:prosody, 
ssml:prosody, 
ssml:say-as, 
ssml:say-as, 
ssml:sub, 
ssml:sub, 
ssml:token, 
ssml:token, 
sub, 
sup, 
term, 
time, 
w, 
w, 
xforms:input, 
xforms:range, 
xforms:secret, 
xforms:select, 
xforms:select1 or 
xforms:textarea 
                           or text
end of choice 
                        
                      
                     end of choice 
                  
                  
                  end of mix 
               Note that in addition to restrictions presented in the content model  above, 
                  					use of this element must also respect the following requirement:
                  
                     - The 
                        
aside element 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 3 variants. The other 2  variants are:
            
            Namespace
            http://www.daisy.org/ns/z3998/authoring/