Thanks to the generous support of Torchbox (http://www.torchbox.com), I

have been able to significantly improve the contrib/xml XPath
integration code.

New features:

* XPath set-returning function allows multiple results from an several
XPath queries to be used as a virtual table.
* Using libxslt, XSLT transformations (with and without parameters) are
supported. (Caution: This support allows generic URL fetching from
within the backend as well).

I've removed the old code so that it is all libxml based. Rather than
attach as a patch, I've put the tar.gz (10k!) at
http://www.azuli.co.uk/pgxml-1.0.tar.gz
(all files in archive are xml/....).

I think this is worth replacing the contrib version with, even though
the function names have changed (though the same functionality is
there), because it includes a SRF and some SPI usage, in addition to
linking to an external library. And it isn't a big module! Obviously, I
understand that people might prefer to move it elsewhere, or might have
reservations about replacing an existing contrib module with an
incompatible one. I'm open to suggestions.

John Gray

contrib/xml/Makefile

@@ -1,13 +1,18 @@
-# $PostgreSQL: pgsql/contrib/xml/Makefile,v 1.4 2003/11/29 19:51:36 pgsql Exp $
-
+# This makefile will build the new XML and XSLT routines.
 subdir = contrib/xml
-top_builddir = ../..
+top_builddir = ../../
 include $(top_builddir)/src/Makefile.global
 
-MODULE_big = pgxml_dom
-OBJS = pgxml_dom.o
-SHLIB_LINK = -lxml2
-DATA_built = pgxml_dom.sql
+MODULE_big = pgxml
+
+# Remove xslt_proc.o from the following line if you don't have libxslt
+OBJS = xpath.o xslt_proc.o
+
+# Remove -lxslt from the following line if you don't have libxslt.
+SHLIB_LINK = -lxml2 -lxslt
+
+DATA_built = pgxml.sql
 DOCS = README.pgxml
 
-include $(top_srcdir)/contrib/contrib-global.mk
+include $(top_builddir)contrib/contrib-global.mk
+