| http://www.w3.org/ns/prov#value | - covering what had become part of the prior art meanwhile and had not been covered before.3 No doubt it is at times hard to say whether amendments are a 'departure from or improper addition to the specifications' or have 'merely made explicit what was already implicit.4 We have ourselves often recognized this embarrassment,5 but we are satisfed that the expansion in this case was a substitution.
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