Accessing XMP Tags via the General Metadata API

Since the XMP standard identifies schema properties using string names rather than numbers, ImageGear also uses names to identify XMP properties. However, it uses numeric identifiers to differentiate between the kinds of entities, such as Description (schema), Array, Property, Qualifier, etc. All properties have ID = ImGearXMPTagIDs.Property, but differ by their names.

See XMP Non-Image Data Structure section for description of XMP metadata structure in ImageGear.

Example:

Representation of XMP metadata using the General API:

- XMP

http://ns.adobe.com/xap/1.0/
- About = "uuid:faf5bdd5-ba3d-11da-ad31-d33d75182f1b"
- Namespace
  - Prefix = "xmp"
  - URI = "http://ns.adobe.com/xap/1.0/"
- Namespace
  - Prefix = "xmpidq"
  - URI = "http://ns.adobe.com/xmp/Identifier/qual/1.0/"
- Properties
  - xap:Rating
    - Value = 4
  - xap:Identifier
    - Value = "1234.0345.34532.234231"
    - Qualifiers
      - xmpidq:Schema
        
        Value = "Accusoft doc IDs"
http://purl.org/dc/elements/1.1/
- Namespace
  - Prefix = "dc"
  - URI = http://purl.org/dc/elements/1.1/
- Properties
  - dc:subject
    - Bag
      - Item
        
        Value = "Test subject 1"
      - Item
        
        Value = "Test subject 2"
  - dc:title
    - Alt
      - Item
        
        Lang = "x-default"
        Value = "XMP Support Specification"