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The "Patterns2" page has been changed by rezan: https://wiki.apache.org/devicemap/Patterns2?action=diff&rev1=24&rev2=25 Simple:: :: Only one pattern token must appear in the token stream. + If 2 or more patterns share the same Pattern``Id, then only one Pattern``Type + needs to match for that pattern to be a candidate. + == RankType == @@ -191, +194 @@ :: Strong patterns are ranked higher than Weak and None. The Rank``Value is ignored and they are ranked by their position in the pattern stream. Specifically, the last matched token position. The lower the position, the higher the rank. When a Strong pattern is found, the pattern matching step can stop and this pattern can be returned without analyzing the rest of the stream. This is because its impossible for another pattern to rank higher. Weak:: - :: Weak patterns are ranked below Strong but above None. A Weak pattern can only be returned in the absence of a Strong pattern. Weak patterns always rank higher than None patterns, regardless of their Rank``Value. The Rank``Value is used to rank between successfully matched Weak patterns. + :: Weak patterns are ranked below Strong but above None. A Weak pattern can only be returned in the absence of a Strong candidate. Weak patterns always rank higher than None patterns, regardless of their Rank``Value. The Rank``Value is used to rank between other Weak patterns. None:: - :: None patterns are ranked below Strong and Weak. A None pattern can only be returned in the absence of successful Strong and Weak patterns. The Rank``Value is used to rank between successfully matched None patterns. + :: None patterns are ranked below Strong and Weak. A None pattern can only be returned in the absence of Strong and Weak candidates. The Rank``Value is used to rank between other None patterns. - In the case where 2 or more patterns have the same Rank``Type and Rank``Value resulting in a tie, + In the case where 2 or more candidates have the same Rank``Type and Rank``Value resulting in a tie, - the pattern with the longest concatenated matched pattern length is used. If that results in + the candidate with the longest concatenated matched pattern length is used. If that results in - another tie, the pattern with the first matched token found is returned. + another tie, the candidate with the first matched token found is returned. - If 2 or more patterns share the same Pattern``Id, then only one Pattern``Type - needs to match for this pattern to be a candidate. + + === Notes === If no candidate patterns are found, the Default``Id is returned. If no Default``Id is defined, a null pattern is returned. - - - === Notes === 2 or more patterns cannot have identical Rank``Type, Rank``Value, and matched tokens. This is undefined behavior since the patterns are identical. The pattern the classifier chooses can be random.
