RE: XML-SAX not quite right II -- RPG400-L

Hi Adam, yes I did read those articles, they are very good on the subject. I noticed the mention of the white space processing but did not realize it's importance until now.

I will go back to the Redbook and incorporate that code, that should get me closer.

Thanks for your interest in my problem.

Sharon

To: rpg400-l@xxxxxxxxxxxx
From: adamglauser@xxxxxxxxxxxx
Subject: Re: XML-SAX not quite right II
Date: Wed, 12 Nov 2008 11:46:27 -0500

Sharon wrote:

when event = *XML_CHARS;
eventval = event + 1;
if %subst(chars : eventval : stringLen) = 'DataArea';
pathvalue = pathvalue;
endif;

EVAL chars

CHARS =
....5...10...15...20...25...30...35...40...45...50...55...60
1 ' <DataArea> <storeNumber>7</storeNumber> <trans'

DataArea appears to be an element in your XML file (your DTD from the
previous message* also shows this). You should be processing the
DataArea start tag using the *XML_START_ELEMENT event.

I haven't written code using XML-SAX, but based on my experience with
other SAX parsers, I think the *XML_CHARS event is meant to return the
characters _between_ elements. Based on the XML document you posted in
your other message*, I think that '%subst(chars : 1 : stringLen)' should
be equal to the following values for the first few *XML_CHARS events:
1: x'0D25' - this is the END_OF_LINE marker for the first line
2: x'0D25' - this is the END_OF_LINE marker for the second
3: x'0D254040' - this is the END_OF_LINE marker for the third line,
plus the two spaces preceding the <DataArea> tag.
4: x'0D2540404040' - this is the END_OF_LINE marker for the fourth
line, plus the leading spaces of the sixth line
5: '7' or x'F7' - this is the value contained in the <storeNumber>
element.

As you can see, *XML_CHARS should fire for _any_ data that is between
elements, including whitespace characters. The XML-SAX opcode has an
option that allows you to trim whitespace, so you'd end up with empty
strings for 1-4. That may help you simplify the *XML_CHARS processing.
According to Barbara Morris, there is even an example of this in the
XML-SAX documentation**.

I've found Jon Paris and Susan Gantner's articles in IBM Systems
magazine helpful for these sorts of topics. This one*** covers XML-SAX,
and should help you get a better handle on how your SaxHandler routine
ought to work.

Hope this helps,
Adam

* http://archive.midrange.com/rpg400-l/200811/msg00144.html
** http://archive.midrange.com/rpg400-l/200704/msg00184.html
*** http://www.ibmsystemsmag.com/i5/march06/coverstory/9021p5.aspx
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