function New-SNSMessageAttribute {
<#
.SYNOPSIS
    Create an SNSMessageAttribute

.PARAMETER Value
    Attribute Value.

.PARAMETER DataType
    Data Type of the attribute. Possible options are String, String.Array, Number, and Binary. Only String and Binary are
    valid for triggering Lambda functions

.PARAMETER AttributeValueName
    Name of the attribute data field. Valid options are StringValue or BinaryValue
#>

    param (
        [Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true)]
        [object]$Value,
        [ValidateSet("String", "String.Array", "Number", "Binary")]
        [string]$DataType = "String",
        [ValidateSet("StringValue", "BinaryValue")]
        [string]$AttributeValueName = "StringValue"
    )
    Import-AWSModule

    $attribute = New-Object -TypeName Amazon.SimpleNotificationService.Model.MessageAttributeValue
    $attribute.DataType = $DataType
    $attribute.$AttributeValueName = $Value
    # This typecast is required, because Powershell. Do not remove it.
    return [Amazon.SimpleNotificationService.Model.MessageAttributeValue]$attribute
}

Set-Alias -Name AsSNSAttribute -Value New-SNSMessageAttribute