Ideas for extra signature strategies

[hardbyte]

Possible extra strategies and set of names for signature generation:

Existing strategies

• ExactCharMatchSig: The letter at given index. (implemented as generate_by_char_at)
• ExactMatchSig: the value of the whole field (implemented as generate_by_feature_value)
• WordSoundSimilarSig: comparison of the sound of the word using metaphone. (implemented as generate_by_metaphone)

New strategies

• FirstWordSig: the first word of the field
• LastWordSig: the last word of the field
• InitialLastWordSig: the first letter and last word of the field (e.g. for formatted names)
• AnyWordSig: any of the words in field
• WordNGramsSig: n-grams of words extracted from a text field
• LetterNGramsSig: n-grams of letters extracted from a text field
• LastNWordsSig: the last n words of the field
• FirstNWordsSig: the first n words of the field
• ArrayCombinationSig: all n-grams of an array field