In the file backend, there exists a write_namespace_decl() function that
is #ifdef-ed out, as well as some calls to it that place the appropriate
declarations in the tag. I've taken the liberty of enabling that
function, and of modifying the write_namespace_decl() calls to include
(hopefully) all the namespaces that can exist in the file. I also
modified the file version check to look at "<gnc-v2" instead of
"<gnc-v2>".
The benefits of this move may not be immediately visible to all. First
off, the change allows the file to work either with or without the
decls, although saving the file will of course include the decls.
Now, the benefit comes when the file is parsed by an XSLT parser. The
two XSLT parsers on Linux that I've tried are Saxon and Xalan, and both
fail due to the namespaces not being declared. Given the availability
of XSLT parsers, coupled with the desire to export the XML file to
different formats, it seems only natural to include the namespace
declarations within the top element below root.
What are the benefits of XSLT? Well, let me tell you...XSLT provides an
easy and rapid way to successfully transform a well-formed XML document
into a variety of other formats without programatically changing Gnucash
(other than the namespace decls, of course ;) I was mucking about with
a question by someone to see if there was a way to get a list of
Customers out of the file. Well, with XSLT, there is. I'm able to pull
a list of customers by name with no effort on my part--simply run the
file and stylesheet through the parser, and voila! you have your list.
In my case (with my one customer), I set up HTML as the output style and
got this (yes, it's raw html).
<html xmlns:cust="http://www.gnucash.org/xml/cust";
xmlns:gnc="http://www.gnucash.org/xml/gnc";>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Finances File</title>
</head>
<body>
<h1>Customers</h1>
<p>My Widgets</p>
</body>
</html>
The point is, much could be done with XSLT to provide the hotly desired
export capabilities without affecting the internals of Gnucash one
single solitary bit. Heck, someone could write a stylesheet that
transforms the Gnucash file to an OO spreadsheet, or worse, to an Excel
spreadsheet (the doc spec is only what, 100 pages? =P)!! but it depends
on having the well-formed XML (which, for the XSLT parser means the
namespaces are declared *shrug*).
Anyhow, the attached patch accomplishes the namespace part. It would
make life easier/safer for XSLT writers, because then they wouldn't have
to edit the Gnucash XML file by hand to add the declarations...
The attached patch is against HEAD, but it applied cleanly (with an
offset) to 1.8.x CVS, too.
Thanks,
--
Matthew Vanecek
perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
********************************************************************************
For 93 million miles, there is nothing between the sun and my shadow except me.
I'm always getting in the way of something...
Index: src/backend/file/io-gncxml-v2.c
===================================================================
RCS file: /home/cvs/cvsroot/gnucash/src/backend/file/io-gncxml-v2.c,v
retrieving revision 1.36
diff -u -r1.36 io-gncxml-v2.c
--- src/backend/file/io-gncxml-v2.c 30 Jul 2003 05:17:37 -0000 1.36
+++ src/backend/file/io-gncxml-v2.c 9 Aug 2003 02:59:16 -0000
@@ -1042,12 +1042,13 @@
} while ( (schedXactions = schedXactions->next) );
}
-#if 0
+#if 1
static void
write_namespace_decl (FILE *out, const char *namespace)
{
g_return_if_fail (namespace);
- fprintf(out, " xmlns:%s=\"\"", namespace);
+ fprintf(out, "\n xmlns:%s=\"http://www.gnucash.org/XML/%s\"";,
+ namespace, namespace);
}
#endif
@@ -1056,16 +1057,21 @@
{
fprintf(out, "<?xml version=\"1.0\"?>\n");
fprintf(out, "<" GNC_V2_STRING);
- /*
+
write_namespace_decl (out, "cd");
+ write_namespace_decl (out, "book");
write_namespace_decl (out, "gnc");
- write_namespace_decl (out, "act");
write_namespace_decl (out, "cmdty");
write_namespace_decl (out, "trn");
- write_namespace_decl (out, "ts");
write_namespace_decl (out, "split");
+ write_namespace_decl (out, "act");
+ write_namespace_decl (out, "price");
write_namespace_decl (out, "sx");
- */
+ write_namespace_decl (out, "ts");
+ write_namespace_decl (out, "slot");
+ write_namespace_decl (out, "cust");
+ write_namespace_decl (out, "addr");
+
fprintf(out, ">\n");
}
Index: src/backend/file/sixtp.c
===================================================================
RCS file: /home/cvs/cvsroot/gnucash/src/backend/file/sixtp.c,v
retrieving revision 1.7
diff -u -r1.7 sixtp.c
--- src/backend/file/sixtp.c 24 Dec 2002 02:27:09 -0000 1.7
+++ src/backend/file/sixtp.c 9 Aug 2003 02:59:16 -0000
@@ -832,7 +832,7 @@
return FALSE;
}
- tag_compare = g_strdup_printf("<%s>", first_tag);
+ tag_compare = g_strdup_printf("<%s", first_tag);
result = (strncmp(cursor, tag_compare, strlen(tag_compare)) == 0);
g_free (tag_compare);
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