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<h1>22. Virtuoso Functions Guide - XMLATTRIBUTES</h1>
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<div id="text">
<h2>XMLATTRIBUTES</h2>
<div class="refpurpose">Creates a list of attributes and their values</div>
<div class="funcsynopsis">
<span class="funcdef">
<span class="function">XMLATTRIBUTES</span>
</span>
(<span class="paramdef">
<span class="parameter">string_expr1 [AS alias1]</span> varchar</span>,
<span class="paramdefoptional">[<span class="optional">string_expr2 [AS alias2]</span> varchar]</span>,
<span class="paramdefoptional">[<span class="optional">...</span>]</span>,
<span class="paramdefoptional">[<span class="optional">string_exprN [AS aliasN]</span> varchar]</span>);
</div>
<div class="refsect1">
<div class="refsect1title">Description</div>
<p>
This function creates a vector that may be used only as argument of
<span class="computeroutput">XMLELEMENT</span> function. The vector has an even number of elements, each odd element is a name of an attribute, an
even element is its value. If the attribute value is NULL, then no attribute and no value is created.
If none of the attribute is created, then the function returns NULL.
If string_expr is a column name, then you can omit the AS clause, and Virtuoso uses the partially escaped form of
the column name as the attribute name.
</p>
</div>
<div class="refsect1">
<div class="refsect1title">Parameters</div>
<div class="refsect2">
<span class="refsect2title">String_exprI [AS aliasI] – </span>
string value; AS clause is mandatory if it is not a column name but an expression of some other sort.
</div>
</div>
<div class="refsect1">
<div class="refsect1title">Examples</div>
<a name="ex_XMLATTRIBUTES" />
<div class="example">
<div class="exampletitle">XMLATTRIBUTES() with two parameters</div>
<p>The following example produces an 'EmpName' elements with two attributes (if value of the column 'Region' is not NULL) or
with one attribute (if value of the column 'Region' is NULL) </p>
<div>
<pre class="screen">
select XMLELEMENT ("EmpName",
XMLATTRIBUTES ("FirstName" || ' ' || "LastName" as "Name", "Region" ))
from "Demo"."demo"."Employees";
callret
VARCHAR
_______________________________________________________________________________
<EmpName Name="Nancy Davolio" Region="WA" />
<EmpName Name="Andrew Fuller" Region="WA" />
<EmpName Name="Janet Leverling" Region="WA" />
<EmpName Name="Margaret Peacock" Region="WA" />
<EmpName Name="Steven Buchanan" />
<EmpName Name="Michael Suyama" />
<EmpName Name="Robert King" />
<EmpName Name="Laura Callahan" Region="WA" />
<EmpName Name="Anne Dodsworth" />
9 Rows.
</pre>
</div>
</div>
</div>
<div class="refsect1">
<div class="refsect1title">See Also</div>
<p>
<a href="fn_XMLELEMENT.html">XMLELEMENT()</a>
</p>
<p>
<a href="fn_XMLFOREST.html">XMLFOREST()</a>
</p>
<p>
<a href="fn_XMLAGG.html">XMLAGG()</a>
</p>
<p>
<a href="fn_XMLCONCAT.html">XMLCONCAT()</a>
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