(Optional attribute) Contains an XPath expression that points to the XML DOM node within the form's underlying XML document that is used for storing the digital signature.
The documentSignatures element is an optional element of the xDocumentClass element.
Example
The following is an example of the documentSignatures 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>