A dictionary used to redirect all objects of a specific type to
a specific object ID.
For example a stamp annotation is an object that describes a
rubber stamp image that floats over a page. This object will
contain links to other objects which will describe features like
the appearance of the stamp. However it also contains a link to the
page on which it is located.
Suppose you want to copy this annotation to another document.
When you call AddFamily
with this annotation you want to include related items like the
annotation appearance but you don't want to include the page on
which it is located. In fact you actually want links to this page
in the source document to be redirected to a different page in the
final destination document.
By specifying a mapping from the "Page" object type to the ID of
a page in the final destination you both stop looking for linked
objects at the point at which a page is discovered and also allow
references to the source page to be linked to the destination page
at the point that CopyTo is
To be precise, each time an IndirectObject is encountered it is
checked for a "Type" entry. If this entry matches an item in the
RemapTypes dictionary then the object is not added and no items to
which it referrers are added. Instead an item is added to the
RemapIDs property specifying a mapping
between the ID of the object in question and the ID specified in
the RemapTypes entry.