# EXAMPLE - Double Metaphone Functions

This example illustrates how to use double metaphone functions to generate phonetic spellings in Designer Cloud.

Functions:

Item

Description

DOUBLEMETAPHONE Function

Returns a two-element array of primary and secondary phonetic encodings for an input string, based on the Double Metaphone algorithm.

DOUBLEMETAPHONEEQUALS Function

Compares two input strings using the Double Metaphone algorithm. An optional threshold parameter can be modified to adjust the tolerance for matching.

Source:

The following table contains some example strings to be compared.

string1

string2

notes

My String

my string

comparison is case-insensitive

judge

juge

typo

knock

nock

silent letters

white

wite

missing letters

record

record

two different words in English but match the same

pair

pear

these match but are different words.

bookkeeper

book keeper

spaces cause failures in comparison

test1

test123

digits are not compared

the end.

the end….

punctuation differences do not matter.

a elephant

an elephant

a and an are treated differently.

Transformation:

You can use the DOUBLEMETAPHONE function to generate phonetic spellings, as in the following:

Transformation Name New formula Single row formula DOUBLEMETAPHONE(string1) 'dblmeta_s1'

You can compare string1 and string2 using the DOUBLEMETAPHONEEQUALS function:

Transformation Name New formula Single row formula DOUBLEMETAPHONEEQUALS(string1, string2, 'normal') 'compare'

Results:

The following table contains some example strings to be compared.

string1

dblmeta_s1

string2

compare

Notes

My String

["MSTRNK","MSTRNK"]

my string

TRUE

comparison is case-insensitive

judge

["JJ","AJ"]

juge

TRUE

typo

knock

["NK","NK"]

nock

TRUE

silent letters

white

["AT","AT"]

wite

TRUE

missing letters

record

["RKRT","RKRT"]

record

TRUE

two different words in English but match the same

pair

["PR","PR"]

pear

TRUE

these match but are different words.

bookkeeper

["PKPR","PKPR"]

book keeper

FALSE

spaces cause failures in comparison

test1

["TST","TST"]

test123

TRUE

digits are not compared

the end.

["0NT","TNT"]

the endâ€¦.

TRUE

punctuation differences do not matter.

a elephant

["ALFNT","ALFNT"]

an elephant

FALSE

a and an are treated differently.