Graph Analysis Matching Program

1
Graph Analysis Matching Program

• Burdette Pixton

2
Record Linkage

• Object Identification Problem
• Identifies possible links in pedigrees
• Advantages
• Compress search results
• Merge pedigrees
• Discover missing Information

3
Record Linkage

• Manual
• Time consuming
• Error prone
• N2
• Blocking
• n2

4
Record Linkage

• Current Approaches
• Naïve approach
• Deterministic algorithms
• Probabilistic Algorithms

5
Record Linkage
Name James Paul
Name J. Paul
Sex M
Sex M
DOB 7/4/1804
DOB 7/11/1804
POB England
POB England
DOD 8/15/1845
DOD 8/15/1845
Parents Howard Paul Mary Jones
Parents H. Paul Mary Jones
Children Lucy Paul
Children Lucy Paul
6
Record Linkage

• Problems with Current Standards
• Uses Probabilistic Record Linkage Formula
• Weights and thresholds are 10 years old
• Depends on attributes of one record
• Does not completely solve missing fields problem

7
Record Linkage
Name James Paul
Name J. Paul
Sex M
Sex M
DOB 7/4/1804
DOB 7/11/1804
POB England
POB England
DOD 8/15/1845
DOD 8/15/1845
Parents Howard Paul Mary Jones
Parents H. Paul Mary Jones
Children Lucy Paul
Children Lucy Paul
8
Thesis Statement

• Graph-matching can enhance current record
  linkage techniques to find a smaller set of
  possible matches and have high precision.

9
GRAMP - Overview

• Uses Multiple records
• Transverse two graphs in parallel
• Continue until no more links
• Compare related nodes to each other to get
  measurement

10
Record Linkage
Name James Paul
Name J. Paul
Sex M
Sex M
DOB 7/4/1804
DOB 7/11/1804
POB England
POB England
DOD 8/15/1845
DOD 8/15/1845
Parents Howard Paul Mary Jones
Parents H. Paul Mary Jones
Children Lucy Paul
Children Lucy Paul
11
Record Linkage
Name Howard Paul
Name H. Paul
Sex M
Sex M
DOB 2/4/1789
DOB 2/4/1789
POB England
POB England
DOD 1/13/1815
DOD 8/15/1845
Parents Louis Paul ??
Parents Louis Paul Michelle P.
Children James Paul
Children J Paul
12
GRAMP

• Determine probable matches
• Weakness is decreased
• Keep those with potential
• Transverse the graph
• Determine relationships
• Compute similarity matches against both sets
• Recursive calls
• Combine Measurements
• For each node in graph

13
GRAMP

• Testing
• Records with Errors
• Records without Errors
• Random set of Records
• Expected Results
• Do similar or better, smaller blocks
• Slow

14
Contributions

• Provides a useful tool for genealogical, census,
  and statistical programs
• An algorithm which matches objects utilizing
  surrounding nodes
• Offers a different approach to the object
  identity problem

15
Questions/Comments