void XMLResourceDocument::load(IODevice file, const std::string &base_path, const FileSystem &fs)
{
	DomDocument new_document;
	new_document.load(file);

	// Check if loaded document uses namespaces and if its a clanlib resources xml document:
	DomElement doc_element = new_document.get_document_element();
	if (doc_element.get_namespace_uri().empty() && doc_element.get_local_name() == "resources")
	{
		impl->ns_resources = std::string();
	}
	else if (doc_element.get_namespace_uri() == "http://clanlib.org/xmlns/resources-1.0")
	{
		if (doc_element.get_local_name() != "resources")
			throw Exception("ClanLib resource documents must begin with a resources element.");

		impl->ns_resources = "http://clanlib.org/xmlns/resources-1.0";
	}
	else
	{
		throw Exception("XML document is not a ClanLib resources document.");
	}

	impl->document = new_document;
	impl->fs = fs;
	impl->base_path = base_path;
	impl->resources.clear();

	std::vector<std::string> section_stack;
	std::vector<DomNode> nodes_stack;
	section_stack.push_back(std::string());
	nodes_stack.push_back(doc_element.get_first_child());
	while (!nodes_stack.empty())
	{
		if (nodes_stack.back().is_element())
		{
			DomElement element = nodes_stack.back().to_element();
			if (element.get_namespace_uri() == impl->ns_resources && element.get_local_name() == "section")
			{
				std::string section_name = element.get_attribute_ns(impl->ns_resources, "name");
				section_stack.push_back(section_stack.back() + PathHelp::add_trailing_slash(section_name, PathHelp::path_type_virtual));
				nodes_stack.push_back(element.get_first_child());
				continue;
			}
			else if (element.has_attribute_ns(impl->ns_resources, "name"))
			{
				std::string resource_name = element.get_attribute_ns(impl->ns_resources, "name");
				std::string resource_id = section_stack.back() + resource_name;
				impl->resources[resource_id] = XMLResourceNode(element, *this);
			}
		}

		nodes_stack.back() = nodes_stack.back().get_next_sibling();

		while (nodes_stack.back().is_null())
		{
			nodes_stack.pop_back();
			section_stack.pop_back();
			if (nodes_stack.empty())
				break;
			nodes_stack.back() = nodes_stack.back().get_next_sibling();
		}
	}
}