Represents a PDF document.
The name of the person who created the document.
Permanent identifier based on the contents of the file at the time it was originally created.
Keywords associated with the document.
Outline to build the table of contents.
Number of pages in the document.
Default reading progression of the document.
The subject of the document.
The document's title.
Closes this object and releases any resources associated with it. If the object is already closed then invoking this method has no effect.
The first page rendered as a cover.