And from even further in the future...
There is an app in Splunkbase which supports Levenshtein distance, Damerau-Levenshtein_distance, Jaro distance, Jaro winkler, match rating comparison, and Hamming distance comparisons, plus a number of phonetic algorithms, including soundex. It is called JellyFisher. Here is a sample Levenshtein distance evaluation using this app:
... | jellyfisher levensthein_distance(sourcetype,source)
What would be returned here is an integer, according to this description of Levenshtein distance.
Each of the JellyFisher functions returns the result in a field named after the function (i.e., levensthein_distance, damerau_levenshtein_distance, soundex).
Here is a link to the JellyFisher app.
Here is a mocked-up use of it:
| makeresults
| eval foo="kitten", bar="smitten"
| jellyfisher levenshtein_distance(foo, bar)
| table foo bar levenshtein_distance
... View more