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simple DOM-style XML parser, in C++?

• From: Paul Miller <stele@f...>
• To: xml-dev <xml-dev@i...>
• Date: Fri, 03 Dec 1999 15:49:16 -0500

I just "discovered" this list, and I wanted to check into the existence
of a simple parser that provides DOM-like access, before I implemented
my own (on top of expat). I've heard of SAX, and wonder if the C++
interface does anything like what I want to do.

I'm looking for a simple query interface that provides generic access to
elements and attributes, possibly with iterator-style access.

Here is an example XML file, and how I would like to go about parsing
it:

<Container name="foo" type="bar">
	<Foo name="element" length="42"/>
	<Object name="object1">
		<SubObject/>
	</Object>
	<Object name="object2">
		<SubObject/>
	</Object>
</Container>

// open file (somehow)
XML::File file(filename);
// search for a top-level element
XML::Element element = file.GetElement("Container");
// query attributes
XML::Attribute nameAttr = element.GetAttribute("name");
XML::Attribute typeAttr = element.GetAttribute("type");
// get attribute values
std::string name, type;
nameAttr >> name;
typeAttr >> type;

// look for specific sub-element
XML::Element fooElem = element.GetElement("Foo");
// read attributes directly
fooElem.GetAttribute("name") >> name;
int length;
fooElem.GetAttribute("length") >> length;

// loop over elements by iterator
XML::element_iterator it = element.begin("Object");
while (it != element.end())
{
	XML_Element &objElem = (*it);
	objElem.GetAttribute("name") >> name;
	// etc ...
}

I think something like this is pretty straightforward without all that
DOM complexity. I think this interface can be layered on top of expat.

Does the C++ SAX interface already do something like this? *should* I be
using DOM instead for something this simple?

--
Paul Miller - stele@f...

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