Non-scripter attempting a metatagging script

Question

my script is doing everything i want except it is converting all spaces and periods to semicolons in the final metatag and i cannot figure out why.
It will be VERY obvious that the attached script is nothing but a bunch of snippets clipped together to perform most of what i want...
I want to run this script at the end as i am completing a project to insert the needed metatags.
i want the project name
i want the copyright info
i want keywords to include all images used in the document
i want to be able to add keywords.
to run this script you will need a character style called    KeywordsCStyle
//-----document title and copyright---------
var myDocument = app.activeDocument;
with (myDocument.metadataPreferences){ 
    //author = "Adobe"; 
    copyrightInfoURL = "UPMC.com" 
    copyrightNotice = "© 2014 UPMC"; 
    copyrightStatus = CopyrightStatus.yes; 
    //description = "Example of xmp metadata scripting in InDesign CS"; 
    documentTitle = myDocument.name.split(".indd")[0];
    //jobName = "XMP_Example_2003"; 
    //var myNewContainer = createContainerItem("http://ns.adobe.com/xap/1.0/", "email"); 
    //setProperty("http://ns.adobe.com/xap/1.0/", "email/*[1]", "[email protected]"); 
with (myDocument.metadataPreferences){
        //author = "scott rudy";
        documentTitle = myDocument.name.split(".indd")[0];
//var curDocTitle = app.activeDocument.metadataPreferences.documentTitle;
//var curAuthor = app.activeDocument.metadataPreferences.author;
var curKeywords = app.activeDocument.metadataPreferences.keywords;
Array.prototype.unique = function (){
    var r = new Array();
    o:for(var i = 0, n = this.length; i < n; i++){
        for(var x = 0, y = r.length; x < y; x++){
            if(r[x]==this[i]) continue o;}
        r[r.length] = this[i];}
    return r;
function addXMP(/*find GREP*/findString, /*para style*/paraStyle, /*chr style*/chrStyle, /*insert to*/XMPdest){
  // reset search fields
  app.findGrepPreferences = NothingEnum.nothing;
  app.changeGrepPreferences = NothingEnum.nothing;
  // setting search parameters
  if(findString)app.findGrepPreferences.findWhat = findString;
  if(paraStyle)app.findGrepPreferences.appliedParagraphStyle = paraStyle;
  if(chrStyle)app.findGrepPreferences.appliedCharacterStyle = chrStyle;
  switch (XMPdest){
    // insert keywords
    case "Keywords":
      var myKeywords = app.activeDocument.findGrep();
      var myKeys = Array();
      // loop through keywords and get contents
      for(var i = 0; i < myKeywords.length; i++)
        myKeys.push(myKeywords[i].contents);
      //myKeys.sort();
      // delete duplicates
      //myKeys = myKeys.unique();
      // insert Keywords to document XMP
      app.activeDocument.metadataPreferences.keywords = myKeys;
      break;
    // Heading search/insert
    case "Heading":
      var myHeading = app.activeDocument.findGrep();
      app.activeDocument.metadataPreferences.documentTitle = myHeading[0].contents;
      break;
    // Author search/insert
   // case "Author":
    //  var myAuthor = app.activeDocument.findGrep();
    //  app.activeDocument.metadataPreferences.author = myAuthor[0].contents;
   //   break;
// copy all image names //----------------------------------------------//
f = app.activeDocument.textFrames.add({geometricBounds:[0,0,"20mm","20mm"]}); 
f.contents = app.activeDocument.links.everyItem().name.join("\r"); 
f.parentStory.texts[0].select(); 
//-----------change character style-------------------//
var cName = "KeywordsCStyle"; 
  var mCstyle = app.activeDocument.characterStyles.item(cName); 
  if (mCstyle.isValid) 
       app.selection[0].applyCharacterStyle(mCstyle);
app.copy(); 
// add Keywords
addXMP("\\w{1,}","","KeywordsCStyle","Keywords");
// add Heading
//addXMP("","HeadingPStyle","","Heading");
//add Author
addXMP("","AuthorPStyle","","Author");
//----delete image names textbox--------
f.remove();

Answer 1

I decided to give up on the character style to add keywords so i have to thank JUmp_over for all the help with my complete script...
here it is after i cleaned it up if anybody else has a need to add keywords to their indesign file (and ultimately to the resulting PDFs
//-----document title and copyright---------
var myDocument = app.activeDocument;
with (myDocument.metadataPreferences){ 
    copyrightInfoURL = "UPMC.com" 
    copyrightNotice = "© 2014 UPMC"; 
    copyrightStatus = CopyrightStatus.yes; 
    documentTitle = myDocument.name.split(".indd")[0];
//---------------------add document name-------------------------------
with (myDocument.metadataPreferences){
        documentTitle = myDocument.name.split(".indd")[0];
//-----------------------images to keywords--------------------------//
app.activeDocument.metadataPreferences.keywords = app.activeDocument.links.everyItem().name;
//-------------open file info dialog box---------------------
app.menuActions.itemByID(89092).invoke()