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Adobe Portable Document Format (PDF) files are made of a number
of objects. Objects may describe a page, a resource, a sequence
of drawing operations an image or many other components as required
by the document.
Every object has a unique Object ID and a characteristic Object
Type. The root of the document hierarchy can be accessed using the
Root
property.
IDs are numbered from one upwards. The ID zero refers to the Empty
Object which is an object required internally within ABCpdf. ID
-1 refers to the document trailer.
You can use core information types to allow you to iterate through
every object in your document. To get information about an object
you need to use the GetInfo
function. To change properties of an object you need to use the
SetInfo
function. All objects support the core properties listed below.
Additionally Specific Objects support
other types of properties in addition to the core properties listed
below.
Core Object Information Types
| Type Name |
GetInfo |
SetInfo |
Description |
| ID |
 |
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The Object ID of the Object.
For any object which exists the code theDoc.GetInfo(theID,
"ID") will always be equal to theID.
Object IDs are unique.
|
| Type |
|
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The Type of the Object.
This is a four character code that specifies the type of
an object. Different object types have different properties.
|
| Active |
|
|
This property is included for historical reasons.
The value of this property is always 1.
|
| Value |
|
|
The content of the object as it will be inserted into the
final PDF document.
Note that the content of an object may be large and it may
contain unusual characters.
See the Object Paths section
of this document for further details.
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| /Label |
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Any object in a PDF dictionary may be referenced by name.
Most PDF objects are dictionaries. Dictionaries contain a
number of entries, each tagged with a unique name starting
with a slash character. You can access any named entry by
simply passing the unique name to the GetInfo or SetInfo function.
Named entries are case sensitive.
See the Object Paths section
of this document for further details.
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| Count |
|
|
The maximum Object ID in the document.
This property should only be used with Object ID 0.
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| License |
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The current license.
This property should only be used with Object ID 0.
Getting the license returns a description of the current
license. Setting the license allows you to install an existing
license key.
When setting the license you can use a license key as provided
when you purchase. Or you can use a trial license key taken
from the PDFSettings application. The trial license key can
be useful for deploying on shared servers.
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