GB/T 35304-2017 in English
VALIDUniform content label format specification
- Issued on:2017-12-29
- Implemented on:2018-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$650.00
《GB/T 35304-2017统一内容标签格式规范》由TC352（全国中文新闻信息标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Standard Background and Technical Evolution
With the explosive growth of Internet content, the traditional URL address identification method can no longer meet the needs of content semantic description. GB/T 35304-2017 innovatively proposed the Uniform Content Label (UCL) system, which realizes the multi-dimensional description of content characteristics through the binary structure of code part + attribute part. The standard was led by the National Technical Committee for Standardization of Chinese News Information and jointly formulated by Xinhua News Agency, Tsinghua University and other institutions.
Core architecture analysis
| Structural module | Byte length | Core function | Required requirement |
|---|---|---|---|
| UCL code part | 32 bytes (extensible) | Basic identification, security level, content classification | Required |
| UCL attribute part | Variable length | Semantic description, management information, digital signature | Required for standard indexing |
Typical application scenario
When a news organization uses the UCLv2 standard to identify breaking news:
1. The code part sets Media Type = 01000 (News Portal)
2. The security level code is set to 01 (Provider Certification) + 5 (Physical Security) + 6 (Logical Security)
3. The attribute part includes required fields such as title, summary, and responsibility chain
Key Technology Implementation
1. Security Level Mechanism
Adopts a dual evaluation system of physical security level (0-7) and logical security level (0-7), and supports level transition through multi-level certification.
- 00: Self-calibration
- 01: Content provider certification
- 10: Authoritative content center certification
2. Content classification system
| Classification level | Coding position | Value range | Example |
|---|---|---|---|
| Media type | Byte 0, 3-7 | 32 types (5bit) | 01010=Content and information service |
| First level category | Byte 8 | 256 types (8bit) | Refer to GB/T 20093-2013 |
| Secondary category | 9th byte | 256 types (8bit) | Industry custom extension |
Implementation suggestions
1. Deployment path
- Content production: embed UCL code generation tool
- Distribution: implement intelligent routing based on priority strategy (7.1.4)
- Consumption: parse security energy level code (7.1.12) for trusted verification
2. Compatibility design
Multi-version coexistence is achieved through the version domain (7.1.2). It is recommended that:
- The new system supports UCLv3 (011) by default
- Reserve 8 version number spaces from 000 to 111
3. Performance optimization
The matching information subcomponent (7.2.2) is used to quickly locate the content description property set (CDPS). 16-bit binary can represent 65535 combinations.
Comparison Analysis of Standards
| Standards | Identification Dimension | Security Mechanism | Extensibility |
|---|---|---|---|
| URL(RFC 1738) | Address Location | None | Poor |
| DOI(ISO 26324) | Digital Object | Basic Authentication | Medium |
| UCL(this standard) | Multidimensional Semantics | Energy Level Transition | Strong(16-byte multiple expansion) |
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