to their provenance and relationships according to the concepts and principles of archival arrangement. [Models (MCP)] 
n., The signature of witnesses to the making of a will or deed. Under the Wills Act 1837 as amended the testator must
acknowledge his signature (see acknowledgment) in the presence of two witnesses who must each sign (attest) at the same
time in the testator's presence. The signature of each party to a deed must be attested by one witness. [Government] 
See
: archival arrangement [Archives