Standard for embedding KeyInfo

[Kelly Graus]

I'm working on signing an XML document using a X509 certificate.  As 
part of the signing process, I am appending DSIGKeyInfoX509 information 
in the signature (by calling appendX509Data on the DSIGSignature 
object).  Once that is there, I am manually adding the name of the 
certificate, and then using that name to find the certificate when 
verifying.
Is there a standard as to what types of information should be stored 
there?  And once the data is stored, is there an automated way of 
loading the certificate based on the data?

Kelly