Classification Fragments Dan Gillman

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

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

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

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

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

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

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

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