prov:value
| - Possible unary operators comprise bitwise complement and NOT. Possible binary operators comprise logical, arithmetic, and bitwise operations. <operand> is expressed by <protocol expression>|<literal number> <policy variable>, where <protocol expression> is <protocol>{[offset: byte length]}. <protocol> may comprise TCP, ICMP, UDP, IP, MAC, IGMP, GCP,PUP, RAW, and other protocols.
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