docs: OpenXML.get_Modified ( Fixes #24 )

Author: StartAutomating

Types/OpenXML/Alias.psd1

@@ -0,0 +1,10 @@
+@{
+    Part = 'Parts'
+    
+    CreatedAt = 'Created'
+    ModifiedAt = 'Modified'
+
+    # FileInfo compatibility
+    CreationTime = 'Created'    
+    LastWriteTime = 'Modified'
+}

Types/OpenXML/get_Modified.ps1

@@ -0,0 +1,9 @@
+<#
+.SYNOPSIS
+    Gets OpenXML modified time
+.DESCRIPTION
+    Gets the time an OpenXML file was modified, according to core document metadata.
+.EXAMPLE
+    Get-OpenXML ./Examples/Blank.docx | Select-Object -ExpandProperty Modified
+#>
+$this.Parts.'/docProps/core.xml'.content.coreProperties.modified.innerText -as [DateTime]