When I sign an XML document I get:
<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="xmldsig-f62dafae-6983-4b97-9b52-3f24c6960c43">
....
<ds:SignatureValue Id="xmldsig-f62dafae-6983-4b97-9b52-3f24c6960c43-sigvalue">
VpJzFiW62NK2ytlUkAYF....
</ds:SignatureValue>
....
</ds:Signature>
Is it possible to get ds:SignatureValue without the Id attribute?
It isn't possible to control the presence/value of that (and other) IDs, since it's hard-coded on the signer class. These IDs may be needed by some qualifying properties, hence being added.