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Oracle Java CAPS Master Index Match Engine Reference     Java CAPS Documentation
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Document Information

Master Index Match Engine Reference

About the Master Index Match Engine

Related Topics

Master Index Match Engine Overview

Data Matching Concepts

Deterministic and Probabilistic Data Matching

Weighting Thresholds

Probabilities and Direct Weights

Matching and Unmatching Probabilities

Agreement and Disagreement Weight Ranges

How the Master Index Match Engine Works

Master Index Match Engine Structure

Master Index Match Engine Configuration Files

Master Index Match Engine Matching Weight Formulation

Master Index Match Engine Data Types

The Master Index Match Engine and the Master Index Standardization Engine

Oracle Java CAPS Master Index Standardization and Matching Process

Master Index Match Engine Matching Configuration

The Master Index Match Engine Match Configuration File

Master Index Match Engine Match Configuration File Format

Match Configuration File Sample

Probability Type Section

Matching Rules Section

Master Index Match Engine Matching Comparison Functions At a Glance

Master Index Match Engine Comparator Definition List

Master Index Match Engine Comparison Functions

Bigram Comparators

Bigram Comparator (b1)

Advanced Bigram Comparator (b2)

Uncertainty String Comparators

Advanced Jaro String Comparator (u)

Winkler-Jaro String Comparator (ua)

Condensed String Comparator (us)

Advanced Jaro Adjusted for First Names (uf)

Advanced Jaro Adjusted for Last Names (ul)

Advanced Jaro Adjusted for House Numbers (un)

Advanced Jaro AlphaNumeric Comparator (ujs)

Unicode String Comparator (usu)

Unicode AlphaNumeric Comparator (usus)

Exact Character-to-Character Comparator (c)

Numeric Comparators

Integer Comparator (nI)

Real Number Comparator (nR)

Condensed AlphaNumeric SSN Comparator (nS)

Date Comparators

Date Comparator With Years as Units (dY)

Date Comparator With Months as Units (dM)

Date Comparator With Days as Units (dD)

Date Comparator With Hours as Units (dH)

Date Comparator With Minutes as Units (dm)

Date Comparator With Seconds as Units (ds)

Prorated Comparator (p)

Creating Custom Comparators for the Master Index Match Engine

Custom Comparator Overview

About the Comparator Package

Defining Custom Comparators

Before You Begin

Step 1: Create the Custom Comparator Java Class

initialize

Description

Syntax

Parameters

Return Value

Throws

compareFields

Description

Syntax

Parameters

Return Value

Throws

setRTParameters

Description

Syntax

Parameters

Return Value

Throws

stop

Description

Syntax

Parameters

Return Value

Throws

Step 2: Register the Comparator in the Comparators List

To Register the Comparators

Step 3: Define Parameter Validations (Optional)

To Define Parameter Validations

validateComparatorsParameters

Description

Syntax

Parameters

Return Value

Throws

Step 4: Define Data Source Handling (Optional)

To Define Data Source Handling

handleComparatorsDataSources

Description

Syntax

Parameters

Return Value

Throws

DataSourcesProperties Class

getDataSourcesList

Description

Syntax

Parameters

Return Value

Throws

isDataSourceLoaded

Description

Syntax

Parameters

Return Value

Throws

setDataSourceLoaded

Description

Syntax

Parameters

Return Value

Throws

getDataSourceObject

Description

Syntax

Parameters

Return Value

Throws

Step 5: Define Curve Adjustment or Linear Fitting (Optional)

To Define Curve Adjustment or Linear Fitting

processCurveAdjustment

Description

Syntax

Parameters

Return Value

Throws

Step 6: Compile and Package the Comparator

Step 7: Import the Comparator Package Into Oracle Java CAPS Master Index

To Import a Comparison Function

Step 8: Configure the Comparator in the Match Configuration File

Master Index Match Engine Configuration for Common Data Types

The Master Index Match String

Master Index Match Engine Match String Fields

Person Data Match String Fields

Address Data Match String Fields

Business Name Match String Fields

Master Index Match Engine Match Types

Configuring the Match String for a Master Index Application

Configuring the Match String for Person Data

Configuring the Match String for Address Data

Configuring the Match String for Business Names

Fine-Tuning Weights and Thresholds for Oracle Java CAPS Master Index

Data Analysis Overview

Customizing the Match Configuration and Thresholds

Determining the Match Fields

Customizing the Match Configuration

Probabilities or Agreement Weights

Defining Relative Value

Determining the Weight Range

Weight Ranges Using Agreement Weights

Weight Ranges Using Probabilities

Comparison Functions

Determining the Weight Thresholds

Specifying the Weight Thresholds

Weight Distribution Method

Percentage Method

Fine-tuning the Thresholds

Prorated Comparator (p)

The The Prorated Comparator uses a relative distance calculation and allows you to specify how quickly the agreement weight between two fields decreases. Matching weights are assigned with a linear adjustment according to the parameters you specify. You specify an initial agreement range. If the difference between two fields falls within that range, the fields are considered a complete match. You also specify a disagreement range ending with the relative distance. If the difference between two fields falls within that range, the fields are considered a non-match. When the difference between the fields falls between those two ranges, they are considered to be partial matches and the agreement weight is adjusted linearly. Any difference greater than the relative distance is always considered a non-match.

Figure 3 illustrates how weighting is adjusted per the parameters you define. In these diagrams, the green line indicates full agreement, the light blue line indicates prorated agreement, and the red line indicates full disagreement. The diagrams illustrate how increasing the disagreement weight causes the prorated agreement weight to decrease more sharply.

Figure 3 Prorated Linear Adjustment Comparison

image:Figure shows two examples of how weights are assigned using the prorated comparison function.

The prorated comparison functions takes the parameters listed in Table 11.

Table 11 Prorated Comparison Function Parameters

Parameter
Description
range
The greatest difference between two numbers at which they can still be considered a match or partial match.
tolerance1
The greatest difference between two numbers at which they are considered a full match. This number must be less than the relative distance.
tolerance2
This number indicates the minimum difference at which two numbers are considered a non-match and shortens or lengthens the weighting scale. To find this difference, the match engine subtracts this value from the relative distance. If the fields differ by that amount or greater, they are considered to be a non-match.

The weighting scale decreases in size as the value of the full-disagreement parameter increases (see diagram).