Explain how to deal with XML namespaces inside the "xpath" function (especially about "default" namespaces, what is really unclear at first glance).
Index: func.sgml
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RCS file: /projects/cvsroot/pgsql/doc/src/sgml/func.sgml,v
retrieving revision 1.516
diff -u -r1.516 func.sgml
--- func.sgml 3 Jun 2010 14:40:42 -0000 1.516
+++ func.sgml 4 Jun 2010 09:48:44 -0000
@@ -8596,8 +8596,11 @@
mappings. This array should be a two-dimensional array with the
length of the second axis being equal to 2 (i.e., it should be an
array of arrays, each of which consists of exactly 2 elements).
- The first element of each array entry is the namespace name, the
- second the namespace URI.
+ The first element of each array entry is the namespace name (alias), the
+ second the namespace URI. It is not required that aliases provided in
+ this array are the same that those being used in the XML document itself (in
+ other words, both in the XML document and in the <function>xpath</function>
+ function context, aliases are <emphasis>local</>).
</para>
<para>
@@ -8612,6 +8615,19 @@
(1 row)
]]></screen>
</para>
+
+ <para>
+ How to deal with default (anonymous) namespaces:
+<screen><![CDATA[
+
+ xpath
+--------
+ {test}
+(1 row)
+]]></screen>
+ </para>
</sect2>
<sect2 id="functions-xml-mapping">