Special comprehensive subdivision table for nuclear industry archives
2Expert Interpretation
Professional interpretation of EJ 657.2-92 Nuclear Industry Archives Special Comprehensive Reclassification Table Standard, covering classification principles, coding methods and application specifications of 8 major categories, suitable for the construction of nuclear industry archives retrieval system.
Standard Background and Technical Evolution
As a supplementary standard for the classification system of nuclear industry archives, EJ 657.2-92 was born in 1992, a critical period for the standardization of archives management in China. This standard inherits the framework of the "Chinese Archives Classification Method", innovates and develops a special sub-classification system for the special needs of the nuclear industry, and solves the classification problems of categories not covered by EJ 657.1.
Core content analysis
| Classification dimensions | EJ 657.1 | EJ 657.2 |
|---|---|---|
| Scope of application | Basic classification system | Special sub-division supplement |
| Coding structure | Pure digital coding | "NEB="+digital mixed coding |
| Number of categories | Main categories | 8 sub-categories |
Detailed explanation of the classification system
4.1 Coding rules
A three-layer structure is adopted:
- Prefix "NEB=" identifies nuclear industry attributes
- Complex semicolon"="connects the main category
- 1-3 Arabic numerals indicate the specific category
4.2 Category application cases
International cooperation agreement archives should be classified into NEB=483, and its complete coding path is:
Main category code + "=" + sub-code (such as "B123=483" represents nuclear fuel international cooperation project archives)
Implementation suggestions
5.1 Key points of system construction
- Establish a mapping relationship with the EJ 657.1 main classification system
- Develop a dedicated sub-code retrieval function module
- Audio-visual archives (NEB=6) need to establish metadata standards separately
5.2 Common problem handling
Cross-category archives (such as documents involving both meetings and management) are recommended to use Multiple indexing method, connect multiple multiple division codes through "=".