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:[EMAIL PROTECTED] Sent: Friday, December 15, 2006 8:29 AM To: [email protected] 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.
