function toXML()
{
$xml = new xmlWriter();
$xml->openMemory();
$xml->startDocument('1.0', 'UTF-8');
$xml->startElement("OpenSearchDescription");
$xml->writeAttribute("xmlns", "http://a9.com/-/spec/opensearch/1.1/");
$xml->writeAttribute("xmlns:jangle", "http://jangle.org/opensearch/");
$xml->writeElement("ShortName", $this->shortName);
if (isset($this->longName)) {
$xml->writeElement("LongName", $this->longName);
}
if (isset($this->description)) {
$xml->writeElement("Description", $this->description);
}
if (isset($this->developer)) {
$xml->writeElement("Developer", $this->description);
}
if (isset($this->contact)) {
$xml->writeElement("Contact", $this->contact);
}
if (isset($this->attribution)) {
$xml->writeELement("Attribution", $this->attribution);
}
if (isset($this->syndicationRight)) {
$xml->writeElement("SyndicationRight", $this->syndicationRight);
}
if (isset($this->adultContent)) {
$xml->writeElement("adultContent", $this->adultContent);
}
if (isset($this->language)) {
if (is_array($this->language)) {
for ($i = 0; $i < count($this->language); $i++) {
$xml->writeELement("Language", $this->language[$i]);
}
} else {
$xml->writeElement("Language", $this->language);
}
}
if (count($this->inputEncoding)) {
if (is_array($this->inputEncoding)) {
for ($i = 0; $i < count($this->inputEncoding); $i++) {
$xml->writeELement("InputEncoding", $this->inputEncoding[$i]);
}
} else {
$xml->writeElement("InputEncoding", $this->inputEncoding);
}
}
if (count($this->outputEncoding)) {
if (is_array($this->outputEncoding)) {
for ($i = 0; $i < count($this->outputEncoding); $i++) {
$xml->writeELement("OutputEncoding", $this->OuputEncoding[$i]);
}
} else {
$xml->writeElement("OuputEncoding", $this->OuputEncoding);
}
}
if (count($this->tags)) {
$xml->writeElement("Tags", join($this->tags, " "));
}
if (count($this->image)) {
$xml->startElement("Image", $this->image["location"]);
if ($this->image["height"]) {
$xml->writeAttribute("height", $this->image["height"]);
}
if ($this->image["width"]) {
$xml->writeAttribute("width", $this->image["width"]);
}
if ($this->image["type"]) {
$xml->writeAttribute("type", $this->image["type"]);
}
$xml->endElement();
}
if (count($this->indexes) || isset($this->exampleQuery)) {
$xml->startElement("Query");
if (isset($this->exampleQuery)) {
$xml->writeAttribute("role", "example");
$xml->writeAttribute("searchTerms", $this->exampleQuery);
}
if (count($this->indexes)) {
$xml->startElement("zr:explain");
$xml->writeAttribute("xmlns:zr", "http://explain.z3950.org/dtd/2.1/");
$xml->startElement("zr:indexInfo");
for ($i = 0; $i < count($this->indexes); $i++) {
$xml->startElement("zr:set");
$xml->writeAttribute("name", $this->indexes[$i]->name);
if ($this->indexes[$i]->identifier) {
$xml->writeAttribute("identifier", $this->indexes[$i]->identifier);
}
$xml->endELement();
for ($x = 0; $x < count($this->indexes[$i]->indexes); $x++) {
$xml->startElement("zr:index");
$xml->startElement("zr:map");
$xml->startElement("zr:name");
$xml->writeAttribute("set", $this->indexes[$i]->name);
$xml->text($this->indexes[$i]->indexes[$x]);
$xml->endElement();
$xml->endElement();
$xml->endELement();
}
}
$xml->endElement();
$xml->endElement();
}
$xml->endElement();
}
$xml->endElement();
return $xml->outputMemory(true);
}
