XMP Schema for WAV files

Hi,
I am planning to use XMP metadata for WAV files and I would like to create a Schema for the same. I know that that XMP has schemas for other Formats like TIFF and EXIF. If there is a XMP schema for WAV already(probably the Adobe Audition uses it), I would like to use it; else, I have to create a custom XMP WAV schema.

Greetings,
Since a WAVE file is actually a simple RIFF file format, I think it should fit into my proposal for embedding XMP data in RIFF files (I already posted it somewhere else in this forum). (For WAVE schemas, thats another story)...
p.s: I have not had any comment from Adobe on this proposal, either they don't read this forum or they don't care...
Comments?
I have the same proposal for IFF files (AIFF/ILBM etc) if you wish to have it?
Here follows the specification:
Embedding XMP data into IBM-Microsoft RIFF file formats
=====================================================================
This proposal permits adding XMP compatible metadata to standard
RIFF files. A RIFF file is composed of chunks of data; each of
the chunks precedeed by a header giving the type of data that
follows, as well as the length of the data in the chunk. For
more information on the RIFF file format, consult the specification
"Multimedia Programming Interface and Data Specifications 1.0"
Including XMP data in an RIFF compatible file is a matter
of adding a subchunk to the INFO LIST chunk. The subchunk
ID for this type of date shall be "IXMP".
Guidelines for RIFF writers
If the XMP packet is to be used, the software can optionally
write out all other INFO LIST registered (from the standard),
assuming the following mapping:
IRSC dc:creator
ICRD dc:date
ICMT dc:description
ICOP dc:rights
IKEY dc:subject
INAM dc:title
IGNR dc:type
IARL dex:source
In the case where they are written, for better validation by reader
software, the XMP packet should also contain the xmp:MetadataDate
property.
For better portability, and to easily modify the embedded
XMP data, the following guidelines should be followed by
the RIFF writer:
- The XMP packet should contain the full packet signature;
this permits easier searching for tools that do not
understand the RIFF file format.
- The XMP packet should be encoded in UTF-8.
- As specified in the XMP specification, an XMP packet
should be filled with blank spaces for easier updating of
the XMP packet without rewriting the entire file.
A suggested size of an XMP chunk is 4096 or 8192 bytes.
- Only one "IXMP" chunk should be present in the INFO LIST
chunk. Preferrably, there should only be one INFO LIST
chunk per file.
Guidelines for RIFF readers
If an XMP packet is present in an RIFF file, then one of
the following options can be used to retrieve the
metadata from the file:
If the existing metadata chunks are also present,
then, one of the following solutions can be used:
a) Compare the xmp:MetadataDate property with the
file modification date to determine which chunk to use
: either the IXMP subchink or the other info subchunks.
(If the file modification date is greater than
xmp:MetadataDate, it is probably safe to assume that
the standard metadata chunks might have been updated
by software that does not
understand XMP packets).
b) Simply ignore these chunks and use the XMP
packet for the metadata.
c) Simply ignore the XMP chunk , and use the
other chunks for getting the metadata of the file.

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