In search of vmware specific OVF schema (http://www.vmware.com/schema/ovf)

Hi,

I have been trying to work with OVF. I need to be able to read/write in OVF files using xml tools.

I have exported VM as OVF using the VI CLient and also programmatically. Each time I get and OVF file with the following namespace reference:

http://www.vmware.com/schema/ovf

I can't find this schema at the respective URL.

Does anyone know where I can find this .xsd?

Thanks in advance,

Derek