Multiple signing on same set of items and on same file

Hi Team,

I would like to know if multiple signing of same items  and on same xml file is possible?
If yes can you please point me to the document explaining how that can be done?

I want to dual sign xml file using both SHA1 and SHA256 because of some internal requirement.

Eg: my abc.xml have below contents
     <name>Rashmi</name>
     <company>Cisco</company>
     <address>zyx</address>

I want to include all the items in abc.xml under the signatures SHA1 and SHA256

Really appreciate your respone.

Thanks,
Rashmi