| ICOSVisitor | An interface for visiting a PDF document at the type (COS) level. | code | html |
| COSBase | The base object that all objects in the PDF document will extend. | code | html |
| COSNumber | This class represents an abstract number in a PDF document. | code | html |
| COSArray | An array of PDFBase objects as part of the PDF document. | code | html |
| COSBoolean | This class represents a boolean value in the PDF document. | code | html |
| COSDictionary | This class represents a dictionary where name/value pairs reside. | code | html |
| COSDocument | This is the in-memory representation of the PDF document. | code | html |
| COSFloat | This class represents a floating point number in a PDF document. | code | html |
| COSInteger | This class represents an integer number in a PDF document. | code | html |
| COSName | This class represents a PDF named object. | code | html |
| COSNull | This class represents a null PDF object. | code | html |
| COSObject | This class represents a PDF object. | code | html |
| COSStream | This class represents a stream object in a PDF document. | code | html |
| COSString | This represents a string object in a PDF document. | code | html |