The 
                  annotation element represents an annotation that an author, editor, publisher, or other individual or agency has added to a document.
                  
                  
               
               Unless an 
                  annotation element has a 
                  
                     role
                      value of 
                  temporary, it must reference at least one element in the document using the 
                  
                     ref
                      attribute or be referenced by at least one 
                  
                     annoref
                     . For annotations that apply to more than one element, use a space-separated list of 
                  xml:id values in the 
                  ref attribute.
                  
               
               The 
                  
                     ref
                      attribute identifies the specific element(s) being annotated by referencing their 
                  xml:id values.
                  
               
               The 
                  annotation element should not be used to add descriptions, footnotes or endnotes. Refer to the 
                  
                     description
                      and 
                  
                     note (block)
                      elements for more information. 
                  
               
               Usage details available in the Usage Details section.
               
             
            Usage Example
<p>…it created a great chasm between my step-mother and me.<annoref ref="anno-04" value="4" /></p>
<annotation xml:id="anno-04" by="translator">
    This needs explanation. In Germany, even by strangers, children are universally addressed…
</annotation>        
    Allowed parents
            annotation, 
               m:annotation-xml, 
               aside, 
               block, 
               d:body, 
               caption, 
               description, 
               item, 
               d:longdesc, 
               note (block variant), 
               note (phrase variant), 
               object, 
               quote, 
               section, 
               d:simplifiedLanguageDescription, 
               d:summary, 
               td, 
               th and 
               d:tour
               
            
            Allowed children
            This element may contain text.
            
            This element may contain the following children: abbr, 
               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, 
               hd, 
               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), 
               ref, 
               its:ruby, 
               s, 
               ssml:say-as (text variant), 
               ssml:say-as (phrase variant), 
               span (text variant), 
               span (phrase variant), 
               sub, 
               ssml:sub (text variant), 
               ssml:sub (phrase variant), 
               sup, 
               table, 
               term, 
               time, 
               ssml:token (text variant), 
               ssml:token (phrase variant), 
               verse and 
               w
               
            
            Content model and additional requirements
            
               optional attributes: 
@about, 
                  
@by, 
                  
@class, 
                  
@content, 
                  
@datatype, 
                  
@desc, 
                  
@its:dir, 
                  
@its:translate, 
                  
@property, 
                  
@ref, 
                  
@rel, 
                  
@rend:prefix, 
                  
@resource, 
                  
@rev, 
                  
@role, 
                  
@ssml:onlangfailure, 
                  
@typeof, 
                  
@xml:base, 
                  
@xml:id, 
                  
@xml:lang and 
                  
@xml:spacea choice of
                  
                  either 
one or more of 
                     
                     any of the 19 elements: 
annotation, 
aside, 
block, 
caption, 
citation, 
code, 
d:description, 
description, 
hd, 
list, 
m:math, 
note, 
object, 
p, 
pagebreak, 
quote, 
ssml:break, 
table and 
verseor 
one or more of 
                     
                     a choice of either one of the 45 elements: 
abbr, 
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, 
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 or 
wor 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 requirements:
                  
                     - The 
                        annotationelement must be referenced by anannorefor reference another element in the document unless it has therolevaluetemporary.
- The 
                        annotationelement must neither be empty nor contain only whitespace.
- Annotations with a 
                        rolevalue oftemporarymust be removed prior to document finalization.
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/
            Usage Details
            
            The optional 
               by and 
               role attributes define the contributor of the annotation and expresses its nature: 
               
            
            
            
               
<object xml:id="mnt" src="mnt.png" />
    <annotation ref="mnt" by="republisher" role="alteration">
        <p>This picture was originally on page 15 in the source but has been moved after the paragraph it split.</p>
    </annotation>
        
                
            
            The lack of a 
               role value indicates the 
               annotation is general in nature; no implicit value should be assumed. The 
               by attribute has an implicit value of 
               author unless an ancestor element establishes a new relationship. 
               
            
            
             Notice also in the preceding example that there isn't an explicit reference to the annotation (i.e., no 
               annoref element). As a result, the 
               annotation establishes its relationship to the text via the 
               ref attribute. Only temporary notes may be included with no reference to them or from them: 
               
            
            
            
               
<annotation role="temporary">
       2010-12-24 - Markup verified to this point. Continuing after holidays. --MG
</annotation>
        
                
            
             The 
               by attribute may be omitted from temporary annotations as they must be removed from a document prior to its finalization. Where
               they are being used to relay production information, however, creating and assigning unique 
               by values for staff/production roles may improve their usability. For example, a quality assurance editor could use the element
               to leave notes for the markup team: 
               
            
            
            
               
<annotation role="temporary" by="qa" class="error">
        Missed merged paragraphs.
</annotation>
        
                
            
            This specification does not attempt to define all the 
               role values needed for all production contexts. New contributor and annotation types can be added as required, however. 
               
            
            
            Attaching more than one 
               annotation to an element is permitted, but each annotation must have a unique 
               role.