The source type of alternate or actual text
Static Properties
| Name | Description |
|---|---|
| SOURCE_CUSTOM | Custom Text |
| SOURCE_XML_STRUCTURE | XML Structure |
| SOURCE_XMP_DESCRIPTION | XMP Description |
| SOURCE_XMP_HEADLINE | XMP Headline |
| SOURCE_XMP_OTHER | User specified XMP metadata property |
| SOURCE_XMP_TITLE | XMP Title |