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MatchRatingApproach

The Match Rating Approach (Western Airlines, 1977) — a codex like the other three, plus the rule for deciding whether two codices name a match.

public static class MatchRatingApproach

Example — the pair from the 1977 description itself, encoded and then compared.

using Lodestar.Text.Phonetics;

string byrne = MatchRatingApproach.Codex("Byrne");   // => BYRN
string boern = MatchRatingApproach.Codex("Boern");   // => BRN
bool? match = MatchRatingApproach.Compare("Byrne", "Boern");   // => True

Remarks — the odd one out in this namespace on two counts. First, Compare answers a question the other three do not: not "what does this sound like" but "do these two sound alike", and its answer depends on both codices at once — their combined length picks a stricter or looser threshold from a fixed table, so a caller holding two codices already still needs Compare rather than comparing them by hand. Second, its accepted alphabet is narrower and stricter: any Unicode letter plus a single space is accepted, and anything else — a digit, an apostrophe, a hyphen — is refused with ArgumentException, where Soundex, Metaphone and Nysiis silently ignore it. The published algorithm has no rule for what a digit sounds like, and refusing says so rather than guessing.

Reference behaviour is jellyfish.match_rating_codex and jellyfish.match_rating_comparison, matched over 420 words and 212 pairs — except where codex length is measured in UTF-8 bytes rather than characters, which decision 0007 does not reproduce.

Applies to — net10.0, netstandard2.0.

See also — Soundex, Metaphone, Nysiis, the phonetics index.

Members

Member	What it does
MatchRatingApproach.Codex	The Match Rating codex of one name.
MatchRatingApproach.Compare	Whether two names' codices rate as a match.