For read an xml embedded in app package at runtime you can use for example jquery whitout problem.
Yourxml.xml:
<?xml version="1.0" encoding="utf-8" ?>
<BookList>
  <Book>
     <Title>title one</Title>
     <Publisher>Publisher one</Publisher>
  </Book>
  <Book>
      <Title>Title two</Title>
      <Publisher>Publisher two</Publisher>
  </Book>
</BookList>
Reading:
$.ajax({
    type: "GET",
    url: "yourxml.xml",
    dataType: "xml",
    success: function(xml) {
        $(xml).find('Book').each(function(){
            var sTitle = $(this).find('Title').text();
            var sPublisher = $(this).find('Publisher').text();
        });
    }
});