Files with xsig file extension are related to the eCofirma application from Spanish government.
XSIG file extension - eCofirma electronic sign
What is xsig file? How to open xsig files?
File type specification:
The xsig file extension is associated with the eCofirma, an application for electronic signature of documents, available for JAVA and developed by Spanish government.
The xsig file stores electronic sign in XAdES format.
This xsig file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.