A File Identifier is described in section 8.3 of the PDF specification. The first string is a permanent identifier based on the contents of the file at the time it was originally created, and does not change as the file is incrementally updated. The second string is a changing identifier based on the file's contents the last time it was updated.

Well-known PDF name objects.

The root of a document's object hierarchy is the catalog dictionary.

A dictionary that contains information about a CIDFont program.

A dictionary containing entries that define the character collection of the CIDFont.

Class that defines a mapping between character codes (CIDs) to a character selector (Identity-H encoding)

PDF defines a standard date format. The PDF date format closely follows the format defined by the international standard ASN.1.

A class that enables a well structured PDF document to be generated.

Class representing a file trailer.

An enumeration listing all the font subtypes

An enumeration listing all the fonts types available in Pdf.

An International Color Code stream

Represents a Identity-H character encoding

Class representing a document information dictionary.

This represents a single Outline object in a PDF, including the root Outlines object. Outlines provide the bookmark bar, usually rendered to the right of a PDF document in user agents such as Acrobat Reader

The pages of a document are accessed through a structure known as the page tree.

The PDF specification describes two conventions that can be used to embed a string in a PDF document. This enumeration, along with the Format property can be used to select how a string will be formatted in the PDF file.

A Type 0 font is a composite font whose glyphs are obtained from a font like object called a CIDFont (a descendant font).

Array class used to represent the /W entry in the CIDFont dictionary.

A PDF file's cross-reference table.