title: How to differentiate between email and chat documents in lotus notes
body: <p>I'm trying to extract all emails and chat history of a person from his nsf file (lotus notes). I'm using Notes.jar. All the entries in nsf files are documents. Is there a way to identify which document is email and which document is chat. There is an item named "Form" which is used to identify mails (memo), meeting invites (appointment). The problem I face here is both email and chat has form type "Memo".
  Kindly suggest me a way to differentiate between email and chat.</p>