creating simple xml document using NSXML in swift 4

xmlDocument.swift

import Cocoa

let node1 = XMLElement(name: "first", stringValue: "Donnie")
let node2 = XMLElement(name: "last", stringValue: "Duck")

let nameNode = XMLElement(name: "name")

nameNode.addChild(node1)
nameNode.addChild(node2)
let root = XMLElement(name: "names")
root.addChild(nameNode)

let document = XMLDocument(rootElement: root)
let xmlData = document.xmlData(options: .nodePrettyPrint)

// swift 3 version:
//let xmlData = document.xmlData(withOptions: Int(XMLNode.Options.nodePrettyPrint.rawValue) )

try? xmlData.write(to: URL(fileURLWithPath: "/tmp/test.xml"))

/*
 
 cat /tmp/test.xml
 
 <names>
    <name>
        <first>Donnie</first>
        <last>Duck</last>
    </name>
 </names>

 */