| http://www.w3.org/ns/prov#value | - However, this type of marking is difficult and/or impractical to implement since an engraving or corresponding physical marking procedure may damage the device to be marked and the resulting marking often has a noticeably unaesthetic effect on the appearance of the article. [0005] A safety marking may also be based on biometric data, such for example as the DNA, fingerprint, or data obtained from
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