b1
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Bigram String Comparator
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Based on the Bigram algorithm, this function
compares two strings using all combinations of two consecutive characters
and returns the total number of combinations that are the same.
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b2
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Advanced Bigram String Comparator
|
Similar to the standard Bigram comparison function (b1), but allows
for character transpositions.
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u
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Generic String Comparator
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Based on the Jaro algorithm, this function compares two strings taking into account
uncertainty factors, such as string length, transpositions, and characters
in common.
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ua
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Advanced Generic String Comparator
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Based
on the Jaro algorithm with variants of Winkler/Lynch
and McLaughlin, this function is similar to the generic string comparator
(u), but increases the agreement weight if the initial characters of each
string are exact matches. This comparison function takes into account key
punch and visual memory errors.
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uf
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Simplified String Comparator - FirstName
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Based on the generic string comparator (u), this function is designed
to specifically weight first name values. The string is analyzed and the weight
adjusted based on statistical data.
|
ul
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Simplified String Comparator - LastName
|
Based on the generic string comparator (u), this
function is designed to specifically weight last name values. The string is
analyzed and the weight adjusted based on statistical data.
|
un
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Simplified String Comparator - House Numbers
|
Based on the generic string
comparator (u), this function is designed to specifically weight house number
values. The string is analyzed and the weight adjusted based on statistical
data.
|
us
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Simplified String Comparator
|
A custom string comparator that compares two strings taking into
account such uncertainty factors as string length, transpositions, key punch
errors, and visual memory errors. Unlike the generic string comparator (“u”),
this function handles diacritical marks. This function also improves processing
speed.
|
usu
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Language-specific String Comparator
|
A custom string comparator similar to the “us”
comparator with the exception that it is based in Unicode to support multiple
languages and alphabets. This comparator takes one parameter indicating the
language to use.
|
c
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Exact char-by-char Comparator
|
Compares string fields character by
character. Each character must match in order for an agreement weight to be
assigned.
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n
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Generic Number Comparator
|
Compares numeric fields using a relative distance
value to determine the match weight. As the difference between the two fields
increases, the match weight decreases. Once the difference is beyond the relative
distance, a disagreement weight is assigned. This comparator takes two parameters;
the first indicates whether to use a relative distance or direct string comparison,
and the second indicates the relative distance to use.
|
nI
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Integer Comparator
|
Compares
integer fields using a relative distance comparison. This comparison function
is based on the generic number comparator (n), and accepts the same parameters.
|
nR
|
Real Number Comparator
|
Compares fields containing real numbers using a relative distance
comparison. This comparison function is based on the generic number comparator
(n), and accepts the same parameters.
|
nS
|
Alphanumeric Comparator
|
Compares social security numbers or other unique identifiers,
taking into account any of these parameters:
-
Field length
-
Character types
-
Invalid values
|
dY
|
Date Comparator - Year only
|
Compares year values using relative distance values prior to and
following the given year to determine the match weight. As the difference
between the two fields increases, the match weight decreases. Once the difference
is beyond the relative distance, a disagreement weight is assigned. The date
comparison functions handle Gregorian years. This comparator takes up to three
parameters; the first indicates whether to use a relative distance or direct
string comparison, and the second and third indicate the relative distance
before and after.
|
dM
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Date Comparator - Month-Year
|
Compares the month and year using a
relative distance as described above for the year comparison function (dY).
|
dD
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Date Comparator - Day-Month-Year
|
Compares the day, month, and year using
a relative distance as described above for the year comparison function (dY).
|
dH
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Date Comparator - Hour-Day-Month-Year
|
Compares the hour, day, month, and year
using a relative distance as described above for the year comparison function
(dY).
|
dm
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Date Comparator - Min-Hour-Day- Month-Year
|
Compares the minute, hour, day, month,
and year using a relative distance as described above for the year comparison
function (dY).
|
ds
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Date Comparator - Sec-Min-Hour-Day- Month-Year
|
Compares the second, minute, hour,
day, month, and year using a relative distance as described above for the
year comparison function (dY).
|
p
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Prorated Comparator
|
Prorates the disagreement weight
for a date or numeric field based on values you specify. Differences greater
than the amount you specify receive the full disagreement weight. This comparator
takes three parameters indicating the relative distance and the agreement
and disagreement ranges.
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