Create Schema Properties in SharePoint 2013 Using PowerShell

[CmdletBinding()]
Param(
  [Parameter(Mandatory=$True,Position=1)]
   [string]$fileName
)

Add-PSSnapin "Microsoft.SharePoint.PowerShell" -ErrorAction SilentlyContinue

write-host "Parsing file: " $fileName
$XmlDoc = [xml](Get-Content $fileName)

#Search Service Application
$sa = $XmlDoc.SearchProperties.ServiceName
$searchapp = Get-SPEnterpriseSearchServiceApplication $sa

#process crawled properties
$CrawledPropNodeList = $XmlDoc.SearchProperties.CrawledProperties
foreach ($CrawledPropNode in $CrawledPropNodeList.CrawledProperty)
{
    #create crawled property if it doesn't exist
    if (!(Get-SPEnterpriseSearchMetadataCrawledProperty -SearchApplication $searchapp -Name $CrawledPropNode.Name -ea "silentlycontinue"))
    {
        $varType = 0
        switch ($CrawledPropNode.Type)
        {
            "Text" { $varType=31 }
            "Integer" { $varType=20 }
            "Decimal" { $varType=5 }
            "DateTime" { $varType=64 }
            "YesNo" { $varType=11 }
            default { $varType=31 }
        }
        $crawlprop = New-SPEnterpriseSearchMetadataCrawledProperty -SearchApplication $searchapp -Category SharePoint -VariantType $varType -Name $CrawledPropNode.Name -IsNameEnum $false -PropSet "00130329-0000-0130-c000-000000131346"
    }
}

#process managed properties
$PropertyNodeList = $XmlDoc.SearchProperties.ManagedProperties
foreach ($PropertyNode in $PropertyNodeList.ManagedProperty)
{
    $SharePointPropMapList = $PropertyNode.Map
    $recreate = [System.Convert]::ToBoolean($PropertyNode.Recreate)
    if ($recreate)
    {
        #Delete if property should be recreated and it exists
        if($mp = Get-SPEnterpriseSearchMetadataManagedProperty -SearchApplication $searchapp -Identity $PropertyNode.Name -ea "silentlycontinue")
        {
            Write-Host "Managed Property Removed: " $PropertyNode.Name
            $mp.DeleteAllMappings()
            $mp.Delete()
            $searchapp.Update()
        }

        #create managed property
        New-SPEnterpriseSearchMetadataManagedProperty -SearchApplication $searchapp -Name $PropertyNode.Name -Type $PropertyNode.Type
    }

    if($mp = Get-SPEnterpriseSearchMetadataManagedProperty -SearchApplication $searchapp -Identity $PropertyNode.Name)
    {
        if($recreate)
        {
            #set configuration for new property
            $mp.RespectPriority = [System.Convert]::ToBoolean($PropertyNode.RespectPriority)
            $mp.Searchable = [System.Convert]::ToBoolean($PropertyNode.Searchable)
            $mp.Queryable = [System.Convert]::ToBoolean($PropertyNode.Queryable)
            $mp.Retrievable = [System.Convert]::ToBoolean($PropertyNode.Retrievable)
            $mp.HasMultipleValues = [System.Convert]::ToBoolean($PropertyNode.HasMultiple)
            $mp.Refinable = [System.Convert]::ToBoolean($PropertyNode.Refinable)
            $mp.Sortable = [System.Convert]::ToBoolean($PropertyNode.Sortable)
            $mp.Update()
        }

        #add property mappings
        foreach ($SharePointPropMap in $SharePointPropMapList)
        {
            $cat = Get-SPEnterpriseSearchMetadataCategory –SearchApplication $searchapp –Identity $SharePointPropMap.Category
            $prop = Get-SPEnterpriseSearchMetadataCrawledProperty -SearchApplication $searchapp -Category $cat -Name $SharePointPropMap.InnerText
            New-SPEnterpriseSearchMetadataMapping -SearchApplication $searchapp -CrawledProperty $prop -ManagedProperty $mp
        }
    }
}