1. Classification Fragments
Dan Gillman

2. Problem Some classification schemes have repeated fragments Fragment
Classification scheme itself
Used more than once in another classification scheme or
Used in more than one other classification scheme
Neuchâtel Model
Does not support Fragments naturally
Can be described however
Need example to illustrate

3. Example Classification
Carpentry Tool Classification
Levels 1 and 2
Tools
Cutting tools
Drilling tools
Measuring tools
Pounding tools
Shaping tools

4. Example Classification
Carpentry Tool Classification
Levels 2 and 3
Cutting tools
Cross-cut saw
Jig saw
Mitre saw
Rip saw
Drilling tools
Awl
Drill
Nail
Screw
Staple

5. Example Classification
Carpentry Tool Classification
Levels 2 and 3
Measuring tools
Level
Ruler
Pounding tools
Hammer
Shaping tools
Chisel
File
Plane
Router
Sandpaper

6. Example Classification
Carpentry Tool Classification
Further differentiation
Hand tool versus electric
Many tools at 3rd level can be further differentiated
Apply fragment to some (more than one!) tools at 3rd level
Fragment
Tool
Hand
Electric

7. Example Classification
Carpentry Tool Classification
List of 3rd level tools needing further differentiation
Cutting -> cross-cut saw
Cutting -> rip saw
Cutting -> jig saw
Drilling -> drill
Drilling -> screwdriver
Drilling -> stapler
Measuring -> level
Shaping -> planer
Shaping -> router
Shaping -> sander

8. Neuchâtel Add attribute to entity: Statistical Classification
Attribute: Usage
Values
Classification
Fragment
Add relationship to entity: Classification Item
Relationship: Parent
Links back to parent Item in scheme, as there is no way to reconstruct the hierarchy without using codes in Neuchâtel

9. Neuchâtel How are Fragments mapped to Statistical Classifications?
Use Correspondence Tables (CT) and Maps (M)
For each image of the Fragment in a SC
Use one CT
For each CI in the Fragment
Use one M to its corresponding CI in the SC
Example
Fragment: Tool -> hand electric
Stat Class: Router -> hand router electric router
Drill -> hand drill electric drill
Rip saw -> hand saw electric saw