Optimized mode (legacy)As illustrated in the examples above, raw value's properties are matched against the input files line-byline. Lines are however not tested in the order they appear but are sorted using an implicit priority. In most of the case, this modified order does not affect the results, but it is good to keep it in mind. Here is a technical example of how it works Linear modeThe linear mode was created to process values exactly in the order of the lines in the data file. No optimizations are done. Each line has its own path so matching is done for each column of each line. Parent topic: Event Property Tagger