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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 iterate through every
object in your document. To get information about an object, you
need to use the GetInfo
method. To change properties of an object, you need to use the
SetInfo
method. 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 |
|
|
The Object ID of the Object.
For any existing object, the code theDoc.GetInfo(theID,
"ID") will always be equal to theID. Object IDs
are unique.
|
| Type |
|
|
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.
|
| /Label |
|
|
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 method. Named entries are
case-sensitive.
See the Object Paths section of
this document for further details.
|
| Count |
|
|
The maximum Object ID in the document.
This property should only be used with Object ID 0.
|
| License |
|
|
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.
|
| ABCpdfVersion |
|
|
The current ABCpdf Version String
This property should only be used with Object ID 0.
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