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<td valign="top" class="NAME">Attributes</td>
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<span class="PROGRAMLISTING"><pre><var class="replaceable">attribute_name</var><strong class="userinput"><var class="replaceable">="</var></strong><var class="replaceable">attribute value</var><strong class="userinput"><var class="replaceable">"</var></strong>
<var class="replaceable">attribute_name</var><strong class="userinput"><var class="replaceable">='</var></strong><var class="replaceable">attribute value</var><strong class="userinput"><var class="replaceable">'</var></strong></pre></span>
<p>Elements may include

attributes.
The order of attributes within an element tag is not significant and
is not guaranteed to be preserved by an XML parser. Attribute values
must appear within either single or double quotations. Attribute
values within a document must conform to the rules explained in the
<link linkend="xmlnut3-CHP-21-SECT-4">Section 21.4</link> of this
chapter.</p>

<p>Note that whitespace may appear around the <span class="LITERAL">=</span>
character.</p>

<p>The value that appears in the quoted string is tested for validity,
depending on the attribute type provided in the
<span class="LITERAL">ATTLIST</span> declaration for the element type.
Attribute values can contain general entity references, but cannot
contain references to external parsed entities. See the <link linkend="xmlnut3-CHP-21-SECT-4">Section 21.4</link> of this chapter for
more information about attribute-value restrictions.</p>
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