Checksum is calculated using SHA512 and can be used to verify a downloaded attachment. A canonicalization of the XML document must be done before checksum calculation.
Canonicalization
http://www.w3.org/TR/2001/REC-xml-c14n-20010315
Type
http://www.w3.org/2001/04/xmlenc#sha512
Attachment name:
VZN 664_ Zmane 15 2025 ÚPN mesta Trnava_lokalita 03-32,34__VR.pdf