> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# PDFAttachmentBindingEnum

PDFAttachmentBindingEnum enumeration constants are used to denote the part of PDF document with which the attached file is associated.

```
typedef enum {
 PAB_Annotation,
 PAB_Document,
 PAB_Portfolio
} PDFAttachmentBindingEnum;
```

## Elements

| Name              | Description                                                                    |
| ----------------- | ------------------------------------------------------------------------------ |
| PAB\\\_Annotation | The attached file is associated with a specific annotation on a specific page. |
| PAB\\\_Document   | The file is attached to the document in general.                               |
| PAB\\\_Portfolio  | The file is attached to a PDF Portfolio.                                       |

## Used in

[IPDFAttachment::Binding](/fine-reader/engine/api-reference/document-related-objects/pdfattachment#binding)