9.2 The <page> element
Attributes
- title
-  (optional) title of this page (displayed at a fixed
  location in a format specified by the style sheet),
- section
-  (optional) Title of document section starting with this
  page. If the attribute is not present, this page continues the
  section of the previous page.  If the attribute is present, but its
  value is an empty string, then the contents of the titleattribute is used instead.
- subsection
-  (optional) Title of document subsection starting
  with this page. If the attribute is not present, this page continues
  the subsection of the previous page.  If the attribute is present,
  but its value is an empty string, then the contents of the
  titleattribute is used instead.
- marked
-  (optional) The page is marked for printing unless the
  value of this attribute is no.
Contents
- An optional <notes>element,
- a possibly empty sequence of <layer>elements,
- a possibly empty sequence of <view>elements,
- a possibly empty sequence of Ipe object elements.
If a page contains no layer element, Ipe automatically adds a default
layer named "alpha", visible and editable. 
If a page contains no view element, a single view where all layers are
visible is assumed.
9.2.1 The <notes> element
This element has no attributes.  Its contents is plain text,
containing notes for this page.
9.2.2 The <layer> element
Attributes
- name
-  (required) Name of the layer.  It must not contain white
  space.
- edit
-  (optional) The value should be yesornoand indicates whether the user can select and modify the
  contents of the layer in the Ipe user interface (of course the user
  can always modify the setting of the attribute).
The layer element must be empty.
9.2.3 The <view> element
Attributes
- layers
-  (required) The value must be a sequence of layer names
  defined in this page, separated by white space.
- active
-  (required) The layer that is the active layer in this view.
- effect
-  (optional) The symbolic name of a graphics effect to be
  used during the PDF page transition.  The effect must be defined in
  the style sheet.
- marked
-  (optional) The view is marked for printing if the value
  of this attribute is yes.
The view element must be empty.