Some XMP SDK implementation questions.

Hi,

I have few questions regarding the XMP SDK, and want to summarize all in one discussion. Here is the file I am working with: http://www.exiv2.org/include/img_1771.jpg

1. Is .arw file format not supported in XMP? What are the other file formats that are not supported?
2. I have difficulties getting  some tags. I would love to know if there is some special technique for these:
   1. Compression - the value should be 6 (not present neither in EXIF nor TIFF domains for integer values)
   2. GainControl - same issue as in case with Compression.
   3. Flash - the value should be 24. The value stored as HEX, how can I get it?
   4. InteroperabilityIndex / Interoperability IFD - the value should be 1416. The InteroperabilityIndex returns an empty string. How can I get it?
   5. JPEGInterchangeFormat, JPEGInterchangeFormatLength - are these two tags supported in XMP SDK?
   6. MakerNote - I know that MakerNote is not supported in XMP, but still I though I could get it not as a text, but as a byte array for example. What is the way to do that?
   7. What is the right way to get XMP tags, that contain array of other fields? e.g xmp:BJ:JobRef.

Thank you!

Mikayel