function Get-Tag {
    [CmdletBinding(DefaultParameterSetName="NoParams")]
    [OutputType('tag')]
    param (
        [parameter(Mandatory=$false,ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true,Position=0,ParameterSetName="ByID")]
        [ValidateScript({ $_ -match "^\d+$" })]
        [ValidateNotNullOrEmpty()]
        [string]
        $Id,
        [parameter(Mandatory=$false,ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true,Position=0,ParameterSetName="ByAddressObject")]
        [ValidateNotNullOrEmpty()]
        [ps.ipam.address]
        $InputObject
    )
    process {
        $_params = @{
            Controller = "addresses"
            Method     = "GET"
            Type       = "tag"
        }
        $_identifiers = @("tags")
        switch ($PSCmdlet.ParameterSetName) {
            "ByID"            { $_identifiers += $Id  }
            "ByAddressObject" { 
                if ($InputObject.TagId) {
                    $_identifiers += $InputObject.TagId
                } else {
                    return $null
                }
             }
        }
        $_params.Add("Identifiers",$_identifiers)

        Invoke-Request @_params
    }
}
Export-ModuleMember -Function Get-Tag