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ImageGear support XMP metadata in the following image file formats:

• TIFF: Read, Write
• EXIF-TIFF: Read, Write
• JFIF-JPEG: Read, Write
• EXIF-JPEG: Read, Write
• PSD: Read

In TIFF and EXIF-TIFF formats, XMP metadata is located in the main IFD.

In JFIF-JPEG and EXIF-JPEG formats, XMP metadata is located in one of the App1 segments. Note that EXIF metadata is also located in an App1 segment.

In PSD format, XMP metadata is located in the Photoshop Resources tree. If XMP.Parse global control parameter is TRUE, it is represented as XMP subtree. If XMP.Parse is FALSE, unparsed XMP metadata is located under PhotoshopImageResources subtree that has ID = 1060.

XMP Root Level

Name	Id	Type	Level Type	Value Type
<Schema namespace URI 1>	IGMDTAG_ID_XMP_DESCRIPTION	Tree	XMP Schema	N/A
<Schema namespace URI 2>	IGMDTAG_ID_XMP_DESCRIPTION	Tree	XMP Schema	N/A
...

XMP Schema Level

Name	Id	Type	Level Type	Value Type
About	IGMDTAG_ID_XMP_ABOUT	Leaf	N/A	String
Namespace	IGMDTAG_ID_XMP_NAMESPACE	Tree	XMP Namespace	N/A
Properties	IGMDTAG_ID_XMP_NAMESPACE	Tree	XMP Property Collection	N/A

XMP Namespace Level

Name	Id	Type	Level Type	Value Type
Prefix	IGMDTAG_ID_XMP_PREFIX	Leaf	N/A	String
URI	IGMDTAG_ID_XMP_URI	Leaf	N/A	String

XMP Property Collection Level

Name	Id	Type	Level Type	Value Type
<Property 1 name>	IGMDTAG_ID_XMP_PROPERTY	Tree	XMP Simple Property / XMP Array / XMP Structure	N/A
<Property 2 name>	IGMDTAG_ID_XMP_PROPERTY	Tree	XMP Simple Property, XMP Array/Structure property	N/A
...

XMP Simple Property Level

Name	Id	Type	Level Type	Value Type
Value	IGMDTAG_ID_XMP_PROPERTY_VALUE	Leaf	N/A	<Value type>
Qualifiers	IGMDTAG_ID_XMP_PROPERTY_QUALIFIERS	Tree	XMP Qualifiers collection	N/A

XMP Array Level

Name	Id	Type	Level Type	Value Type
Bag / Seq / Alt	IGMDTAG_ID_XMP_PROPERTY_BAG / IGMDTAG_ID_XMP_PROPERTY_SEQ / IGMDTAG_ID_XMP_PROPERTY_ALT	Tree	XMP Array items level	N/A

XMP Array Items Level

Name	Id	Type	Level Type	Value Type
Item	IGMDTAG_ID_XMP_PROPERTY	Tree	XMP Simple Property / XMP Language Alternative Property / XMP Structure	<N/A>
Item	IGMDTAG_ID_XMP_PROPERTY	Tree	XMP Simple Property / XMP Language Alternative Property / XMP Structure	<N/A>
...

XMP Language Alternative Property Level

Name	Id	Type	Level Type	Value Type
Value	IGMDTAG_ID_XMP_PROPERTY_VALUE	Leaf	N/A	<Value type>
Lang	IGMDTAG_ID_XMP_PROPERTY_LANG	Leaf	N/A	String

XMP Structure Level

Name	Id	Type	Level Type	Value Type
Struct	IGMDTAG_ID_XMP_PROPERTY_STRUCT	Tree	XMP Structure items level	N/A

XMP Structure Items Level

Name	Id	Type	Level Type	Value Type
<Field 1 name>	IGMDTAG_ID_XMP_PROPERTY	Tree	XMP Simple Property	<N/A>
<Field 2 name>	IGMDTAG_ID_XMP_PROPERTY	Tree	XMP Simple Property	<N/A>
...

 

 

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