The default mode of a signedDataBlock element is single.
Example
The following is an example of the mode attribute as it is used in the signedDataBlock element:
<xsf:documentSignatures>
<xsf:signedDataBlock name="main"
data="my:myfields/my:subtree1 | my:myfields/my:subtree2"
signatureLocation="my:mifields/sig:signatures/main"
mode="countersign">
<xsf:message>By pressing the "Sign" button below, I agree to be bound to the terms of this document. </xsf:message>
</xsf:signedDataBlock>
</xsf:documentSignatures>