code: public static int getType(String tag) {
          if (ElementTags.SUBJECT.equals(tag)) {
              return Element.SUBJECT;
          }
          if (ElementTags.KEYWORDS.equals(tag)) {
              return Element.KEYWORDS;
          }
          if (ElementTags.AUTHOR.equals(tag)) {
              return Element.AUTHOR;
          }
          if (ElementTags.TITLE.equals(tag)) {
              return Element.TITLE;
          }
          if (ElementTags.PRODUCER.equals(tag)) {
              return Element.PRODUCER;
          }
          if (ElementTags.CREATIONDATE.equals(tag)) {
              return Element.CREATIONDATE;
          }
          return Element.HEADER;
      }
docs: Returns the name of the meta information.
  
  @param tag iText tag for meta information
  @return	the Element value corresponding with the given tag