RE: Starting To Use Xerces

I haven't used XSD myself.  One of its authors subscribes to this list
and may respond, but I'd try one of the lists specific to the product,
listed at http://codesynthesis.com/support/. 

-----Original Message-----
From: appleGuy [mailto:alx.curtis@xxxxxxxxx] 
Sent: Friday, December 15, 2006 8:56 AM
To: c-users@xxxxxxxxxxxxxxxxx
Subject: RE: Starting To Use Xerces


Hi,

This Code Synthesis XSD  Looks like just what i Need but I just Need
clarification.

Ive got a project Class, it has variables that I need the XML Data to
fill.
There are also containers (lists) that need to be filled. All in the
same
class.

Would I use C++/Tree or C++/Parser? I need something really easy to use
as
time is short..

After further reading im not too bothard about using seperate methods of
reading & writing XML docs.

Cheers
Alex


Jesse Pelton wrote:
> 
> You don't necessarily have to use the same method for reading
documents
> that you use for generating them.  SAX is a great interface for
building
> up data structures from a document.  It's fast, flexible, and
efficient.
> DOM parsing also has its uses, of course, but it tends to be more
> cumbersome, and uses much more memory.  DOM shines in document
creation,
> however.  So I tend to use SAX for parsing and DOM for generating
> documents, and I suspect that I'm in good company.  It makes a lot of
> sense when you're using XML to represent data that already has an
> in-memory representation, that is, when XML is just a serialization
> format for your data.
> 
> Nonetheless, it sounds like the DOM does what you need.
> 
> You might want to look at the sample apps (DOMPrint, for instance) to
> get a sense of how to use the DOM APIs.  Also consider XML data
binding
> tools such as Code Synthesis XSD
> (http://codesynthesis.com/products/xsd/), which is based on Xerces.
> 
> -----Original Message-----
> From: appleGuy [mailto:alx.curtis@xxxxxxxxx] 
> Sent: Friday, December 15, 2006 8:29 AM
> To: c-users@xxxxxxxxxxxxxxxxx
> Subject: Re: Starting To Use Xerces
> 
> 
> Hi,
> 
> Ok I made the changes to the XML file.
> I think im going to use Dom, i read that it allows saving & creating
XML
> files. I need to use this eventually & because I have a short
timeframe
> I
> just want to get used to one method. IIs this Ok, will Dom Fufil my
> needs?
> 
> Also How would I start to impliment the Dom (for reading files)...
dont
> see
> a constructor anywhere in the docs...Is it createDOMBuilder ??
> 
> Cheers
> Alex
> 
> 
> Alberto Massari wrote:
>> 
>> At 16.15 14/12/2006 -0800, appleGuy wrote:
>> 
>>>Hi,
>>>
>>>This could be quite a long thread, so please bear with me.
>>>Ok ive got Xerces installed & its compiling the example correctly.
>>>
>>>Now im totally new to XML let alone this parser. Ive contructed the
>>>following xml file. I need the file to contain data that can be
parsed
> &
>>>values loaded into predefined variables within my application..
> Firstly I
>>>suppose I need to know if my XML file is ok: (the example uses place
> holders
>>>so author in a real file would be a persons name)
>>>
>>><?xml version="1.0" encoding="ISO-8859-1"?>
>>><loopcardprj>
>>>         <_prjsetup>
>>>                 <title>untitled</title>
>>>                 <author>author</author>
>>>                 <subject>subject</subject>
>>>                 <card>subject</card>
>>>         </_prjsetup>
>>>         <_questions>"What Is 5 x 3?","What Is 5 x 5?","What Is 5 x 
>>> 5?"</_questions>
>>>         <_answers>"15","25","10"</_answers>
>>>         <_comment>This is an example of a file layout for the 
>>> LoopCard Software By
>>>Alex Curtis</_comment>
>>></loopcardprj>
>> 
>> The XML is well-formed; but I would rather use this structure, in 
>> order to avoid complex application logic to associate a question with

>> its answer:
>> 
>>          <_questions>
>>                  <question>
>>                          <q>What Is 5 x 3?</q>
>>                           15 
>>                  </question>
>>                  <question>
>>                          <q>What Is 5 x 5?</q>
>>                           25 
>>                  </question>
>>                  <question>
>>                          <q>What Is 5 + 5?</q>
>>                           10 
>>                  </question>
>>          </_questions>
>> 
>>>(IF OK): I need to know how to use the parser to parse this file &
> dump
> the
>>>data into the correct variables. I read that DOMBuilder was the class
> to
>>>use???
>> 
>> DOMBuilder will build a DOM tree that you will have to navigate 
>> (DOMDocument->getDocumentElement() will give you the pointer to the 
>> "loopcardprj" node; from there, getFirstChild()/getNextSibling() will

>> give you either text nodes containing whitespace or the 
>> "_prjsetup"/"_questions" element; and so on.. until you will find 
>> some text nodes containing the real data).
>> Alternatively you can use a SAXParser or a SAX2XMLReader that will 
>> convert the file into a sequence of callbacks (start "loopcardprj" 
>> element; start "_prjsetup" element; start "title" element; found data

>> "untitled"; end "title" element...); if you just need to convert the 
>> XML file into a C++ data structure, this would be the choice I would
> made.
>> 
>> Alberto
>> 
>> 
>>>Please If you could help, im really new to this XML / Parsing
> Business...
>>>
>>>
>>>Many Thanks
>>>-Alex
>>>--
>>>View this message in context: 
>>>http://www.nabble.com/Starting-To-Use-Xerces-tf2824403.html#a7884089
>>>Sent from the Xerces - C - Users mailing list archive at Nabble.com.
>> 
>> 
>> 
> 
> -- 
> View this message in context:
> http://www.nabble.com/Starting-To-Use-Xerces-tf2824403.html#a7891431
> Sent from the Xerces - C - Users mailing list archive at Nabble.com.
> 
> 
> 

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