function deleteDocumentAncestorsMetadata() {

if(String(app.name).search(“Photoshop”) > 0) {

if(!documents.length) {

alert(“There are no open documents. Please open a file to run this script.”)

return;

}

if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject(“lib:AdobeXMPScript”);

var xmp = new XMPMeta( activeDocument.xmpMetadata.rawData);

xmp.deleteProperty(XMPConst.NS_PHOTOSHOP, “DocumentAncestors”);

app.activeDocument.xmpMetadata.rawData = xmp.serialize();

clearDocumentAncestorsForAllLayers(app.activeDocument);

if (app.activeDocument !== mainDocument) {

app.activeDocument.close(SaveOptions.SAVECHANGES);

}else{

app.activeDocument.save();

}

}

}

function clearDocumentAncestorsForAllLayers(doc) {

try {

if (doc == undefined) {

return;

}

for (var i = 0; i < doc.layers.length; i++) {

var curLayer = doc.layers[i];

if (curLayer.typename != “ArtLayer”) {

clearDocumentAncestorsForAllLayers(curLayer);

continue;

}

if (curLayer.kind == “LayerKind.SMARTOBJECT”) {

app.activeDocument.activeLayer = curLayer;

var idplacedLayerEditContents = stringIDToTypeID(“placedLayerEditContents”);

var actionDescriptor = new ActionDescriptor();

executeAction(idplacedLayerEditContents, actionDescriptor, DialogModes.NO);

if(app.activeDocument.activeLayer == curLayer){

continue;

}

deleteDocumentAncestorsMetadata()

layerSetStr += (“\n”+curLayer.name)

}

}

} catch (e) {

alert(“Layer clean fail.name=”+doc+”;e=”+e)

}

}

var layerSetStr = “”;

var mainDocument = app.activeDocument;

function start(){

deleteDocumentAncestorsMetadata();

alert(“Clean finished.\n[doc name]:”+mainDocument.name+”\n[layer set]:”+layerSetStr);

}

try{

if(confirm(“Start to clean?”)){

start();

}

} catch (e) {

alert(“Clean fail.e=”+e)

}