New-XML.ps1

$xlr8r = [System.Management.Automation.PSObject].Assembly.GetType('System.Management.Automation.TypeAccelerators', $true, $true)
$xlinq = [Reflection.Assembly]::Load("System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")
$xlinq.GetTypes() | ? { $_.IsPublic -and !$_.IsSerializable -and $_.Name -ne "Extensions" -and !$xlr8r::Get[$_.Name] } | % {
  $xlr8r::Add( $_.Name, $_.FullName )
}

function script:New-Xml {
Param(
   [Parameter(Mandatory = $true, Position = 0)]
   [System.Xml.Linq.XName]$root
,
   [Parameter(Mandatory = $false)]
   [string]$Version = "1.0"
,
   [Parameter(Mandatory = $false)]
   [string]$Encoding = "UTF-8"
,
   [Parameter(Mandatory = $false)]
   [string]$Standalone = "yes"
,
   [Parameter(Position=99, Mandatory = $false, ValueFromRemainingArguments=$true)]
   [PSObject[]]$args
)
BEGIN {
   if(![string]::IsNullOrEmpty( $root.NamespaceName )) {
      Function New-XmlDefaultElement {
         Param([System.Xml.Linq.XName]$tag)
         if([string]::IsNullOrEmpty( $tag.NamespaceName )) {
            $tag = $($root.Namespace) + $tag
         }
         New-XmlElement $tag @args
      }
      Set-Alias xe New-XmlDefaultElement -scope "Script"
   }
}
PROCESS {
   New-Object XDocument (New-Object XDeclaration $Version, $Encoding, $standalone),(
      New-Object XElement $(
         $root
         #  foreach($ns in $namespace){
            #  $name,$url = $ns -split ":",2
            #  New-Object XAttribute ([XNamespace]::Xmlns + $name),$url
         #  }
         while($args) {
            $attrib, $value, $args = $args
            if($attrib -is [ScriptBlock]) {
               &$attrib
            } elseif ( $value -is [ScriptBlock] -and "-Content".StartsWith($attrib)) {
               &$value
            } elseif ( $value -is [XNamespace]) {
               New-XmlAttribute ([XNamespace]::Xmlns + $attrib.TrimStart("-")) $value
            } else {
               New-XmlAttribute $attrib.TrimStart("-") $value
            }
         }
      ))
}
END {
   Set-Alias xe New-XmlElement -scope "Script"
}
}
function script:New-XmlAttribute {
Param($name,$value)
   New-Object XAttribute $name,$value
}
Set-Alias xa New-XmlAttribute -scope "Script"


function script:New-XmlElement {
  Param([System.Xml.Linq.XName]$tag)
  Write-Verbose $($args | %{ $_ | Out-String } | Out-String)
  New-Object XElement $(
     $tag
     while($args) {
        $attrib, $value, $args = $args
        if($attrib -is [ScriptBlock]) {
           &$attrib
        } elseif ( $value -is [ScriptBlock] -and "-Content".StartsWith($attrib)) {
           &$value
        } elseif ( $value -is [XNamespace]) {
            New-Object XAttribute ([XNamespace]::Xmlns + $attrib.TrimStart("-")),$value
        } else {
           New-Object XAttribute $attrib.TrimStart("-"), $value
        }
     }
   )
}
Set-Alias xe New-XmlElement -scope "Script"