Dynamics Community Forum Thread Details

AL XML Generation - Namespace prefixes not being applied correctly

I'm working with Business Central AL and trying to generate a SOAP XML request with specific namespace prefixes, but some elements aren't getting the prefixes applied correctly.

Problem
When generating XML, elements like Header, Body, and CustomerAccounts should have namespace prefixes (soapenv: and psp:), but they're either getting default namespaces or no prefixes at all.

Current Output

<Envelope
	xmlns:soapenv="http://hidden.com/"
	xmlns:abc="http://hidden.com"
	xmlns:123="http://hidden.com" xmlns="soapenv">
	<Header/ xmlns="soapenv">
	<Body xmlns="soapenv">
		<CustomerAccounts xmlns="abc">
			...
		</CustomerAccounts>
	</Body>
</Envelope>

Desired Output

<soapenv:Envelope
	xmlns:soapenv="http://hidden.com/"
	xmlns:abc="http://hidden.com"
	xmlns:123="http://hidden.com">
	<soapenv:Header/>
	<soapenv:Body>
		<abc:CustomerAccounts>
			...
		</abc:CustomerAccounts>
	</soapenv:Body>
</soapenv:Envelope>

AL Code

local procedure CreateBaseXML(
        namespacePrefix: Text;
        namespaceURI: Text
    ): XmlDocument
    var
        XMLDoc: XmlDocument;
        XMLDec: XmlDeclaration;
        XMLElem: XmlElement;
        XMLElem2: XmlElement;
        XMLAtr: XmlAttribute;
    begin
        XMLDoc := XmlDocument.Create();
        XMLDec := XmlDeclaration.Create('1.0', 'UTF-8', 'yes');
        XMLDoc.SetDeclaration(XMLDec);

        XMLElem := XmlElement.Create('Envelope', namespacePrefix);
        XMLAtr := XmlAttribute.CreateNamespaceDeclaration('123', 'http://hidden.com/');
        XMLElem.Add(XMLAtr);
        XMLAtr := XmlAttribute.CreateNamespaceDeclaration('abc', 'http://hidden.com/');
        XMLElem.Add(XMLAtr);
        XMLAtr := XmlAttribute.CreateNamespaceDeclaration(namespacePrefix, namespaceURI);
        XMLElem.Add(XMLAtr);

        XmlElem2 := XmlElement.Create('Header', namespacePrefix);
        XMLElem.Add(XmlElem2);

        XMLElem2 := XmlElement.Create('Body', namespacePrefix);
        XMLElem.Add(XMLElem2);

        XMLDoc.Add(XMLElem);
        exit(XMLDoc);
    end;

Assume namespacePrefix and namespaceURI is set accordingly i.e., CreateBaseXML('soapenv', 'https://soapenv.com');

What I've Tried