== Seven fundamental questions for the science of library classification / Losee (1993)==

**Citation** - Losee, R. M. (1993). Seven fundamental questions for the science of library classification. Knowledge Organization, 20(2), 65-70.


**Keyword** - [[:information organization]], [[:classification]]

* 最佳化列舉式分類系統 for optimal a (enumerative) classification systems
* 作者認為，回答這些問題就能找出最佳化分類系統的答案 Suggestions are made as to the forms that answers to these questions might take.

• Losee: 建立分類科學, 建立分類系統的模型. (功能保證) 不是從現實實用角度考量
• Classification for purposes here is considered the assignment of a value to an entity and the ordering and organization of these entities by these values.
• Losee 將分類者如同使用者一般, 也劃分在分類系統之外

== 7 questions ==
* What should be the form of subject-indicating representations? 主題標引應該呈現的方式？
** 缺點：列舉式是有限數量表徵的，而且無法呈現兩個並重的主題概念。
** 將所有主題用列舉記號放上分類, 並壓縮之; 相同內涵詞彙合併, 透過PCA找出哪些主題是可以合併的。
* How should distance and dissimilarity values between individual document features be combined？
** Haming distance 與直線距離
* How should distance and dissimilarity values between individual document features be minimized? 文件間的距離與不相似性如何能最小化？
* 3a. Should distance be treated as a linear quantity?
* 4. What is the cost of placing similar or dissimilar documents a certain distance apart?
* 5. In what order should documents be placed?
* 6. Should paths and classification numbers stay constant for all collection variations, e.g., different collection sizes and concentrations?  （answer is "Yes!"）
* 6a. Should the path stay constant for all different collection emphases?
* 7. How should classification performance be measured?
* 7a. What is the best possible classification performance? （no best）
* 7b. What is the worst possible classification performance?



== Note ==

== Metadata/Backlinks ==

{{backlinks>.}}
{{tag>classification}}