| Key | Type | Required? | Description |
| ExtGState
| dictionary
| Optional
| A dictionary that maps resource names to graphics state parameter dictionaries |
| ColorSpace
| dictionary
| Optional
| A dictionary that maps each resource name to either the name of a device-dependent colour space or an array describing a colour space |
| Pattern
| dictionary
| Optional
| A dictionary that maps resource names to pattern objects |
| Shading
| dictionary
| Optional
| A dictionary that maps resource names to shading dictionaries |
| XObject
| dictionary
| Optional
| A dictionary that maps resource names to external objects |
| Font
| dictionary
| Optional
| A dictionary that maps resource names to font dictionaries |
| ProcSet
| array
| Optional
| An array of predefined procedure set names |
| Properties
| dictionary
| Optional
| A dictionary that maps resource names to property list dictionaries for marked content |