diff -r e4ebb16b39ea -r 603d3f8b6302 src/versit/qversitdocument.h
--- a/src/versit/qversitdocument.h	Fri Sep 17 08:34:34 2010 +0300
+++ b/src/versit/qversitdocument.h	Mon Oct 04 01:37:06 2010 +0300
@@ -63,8 +63,10 @@
 public:
     enum VersitType {
         InvalidType,
-        VCard21Type,   // vCard version 2.1
-        VCard30Type    // vCard version 3.0 (RFC 2426)
+        VCard21Type,    // vCard version 2.1
+        VCard30Type,    // vCard version 3.0 (RFC 2426)
+        ICalendar20Type,// iCalendar version 2.0 (RFC 2445)
+        VCard40Type,    // vCard version 4.0
     };
 
     QVersitDocument();
@@ -76,15 +78,25 @@
     bool operator==(const QVersitDocument& other) const;
     bool operator!=(const QVersitDocument& other) const;
 
-    // metadata about the versit document itself.
+    // Metadata about the versit document
+    // The type determines the format for serialization
     void setType(VersitType type);
     VersitType type() const;
 
+    // The componentType is the value of the BEGIN property
+    void setComponentType(QString componentType);
+    QString componentType() const;
+
+    // The content
     void addProperty(const QVersitProperty& property);
     void removeProperty(const QVersitProperty& property);
     void removeProperties(const QString& name);
     QList<QVersitProperty> properties() const;
 
+    void addSubDocument(const QVersitDocument& subdocument);
+    void setSubDocuments(const QList<QVersitDocument>& documents);
+    QList<QVersitDocument> subDocuments() const;
+
     bool isEmpty() const;
     void clear();