RE: Writing XML from a nested DS

Thanks Vern (and Jon and Henrik and René).
I have indeed looked at the developerworks piece (one of the more complete articles I've managed to find). I had not come across the white paper, which appears to provide a lot of info that I'll need to spend some time with and see if I can make the publishing function work for me. Thanks for that!

To your question, "what feeds the DS?": I'm coding an sqlrpgle program that picks the data from several relational files for the customer account in question. That's the easy part. Getting it into XML for the web service to send is my challenge.

Per a archived post I saw from Scott Klement where he recommended just pounding out the XML by hand, I am rethinking (at least for the template) what I can do with that and CGIDEV2. Henrik seems also to be saying that brute force is required.

Just seems like this is not such an exotic situation that hasn't been encountered at least a few times before...

Thanks for your ideas.
-Michael
~~~~~~~~~~~~

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of
Vernon Hamberg
Sent: Tuesday, November 18, 2014 9:29 AM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: Writing XML from a nested DS

Like Jon, I've looked at the SQL support for XML, including the
extensive documentation that's out there - Nick Lawrence has a
considerable amount of stuff out there, as I list here - I bet you've
already looke, Michael!

http://www.ibm.com/developerworks/ibmi/library/i-using-rpg/

There is a list of additional resources near the bottom. And the last
entry in comments by Nick have a link to a major white paper on this
topic - here is the URL -

http://tinyurl.com/qduxo7m

There's a link there to the actual PDF.

Writing this is going to involve host variables with deep nesting
(qualified names) - it's not clear to me that this can all be done in
one statement, and there has not been array processing in SQL, anyhow -
I forget, has it been added recently?

Writing this with CGIDEV2 or PowerEXT or XMLi would be simple - nested
loops would be easily done in the latter 2, since they work at the node
level, not necessarily the template level. So your code would more
closely match the structure of the XML.

Now a question - what feeds the data structures you have? If it is file
data, just go directly from that, skip the structures. Just a thought!!

I'm just asking things - I'd probably go with CGIDEV2, as that's what
I'm using now and can do all I need pretty easily. But there are
alternatives - I'm just not sure the XPath stuff can handle things - I
believe that would be needed.

HTH
Vern

On 11/17/2014 7:15 PM, Jon Paris wrote:

I'd love to see the answer if you can find it Michael. I've found the

syntax of the SQL/XML stuff too arcane for my limited brain.

Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Nov 17, 2014, at 3:57 PM, Koester, Michael <mkoester@data-

east.com> wrote:

I am stretching my SQL capabilities in an attempt to write XML that

reflects a data structure, but it's clear I don't really know what I'm
doing.

Working in i OS 7.1 with TR7, most PTFs up-to-date (but no promises

there).

All the examples (articles, archives, Knowledge Center, etc.) I've

come across just deal with mapping from files, so I'm having difficulty
with the data structure aspect. I am trying to create the XML for a
data structure that has some nested arrays, but otherwise not too
involved. Something on the order of:

d AccountData ds qualified
d Notify n
d EmailTo 50a
d BillPhones likeds(PhoneDetail)

dim(32)

d nbr_Phones 3u 0 inz
d BillPDFs likeds(PDFnames)

d PhoneDetail ds qualified
d Phone 10 0 inz
d PriorPayments likeds(payments) dim(16)
d nbr_Payments 3u 0 inz

d Payments ds qualified
d Amount 8 2 inz
d PaidDate 10a

d PDFnames ds
d PDFcount 3u 0 inz
d PDFid 23a dim(25)

Tools that create XML (with basic examples) are interesting, but

I've yet to see any examples of how to write XML that has nested arrays
I need. I may reconsider CGIDEV2 or XMLi, over my current efforts in
SQL/XML if someone can help me past this hurdle.

My end result is a payload for a web service response to a business

partner.

Many thanks,
Michael Koester