GB/T 38371.2-2020 in English
VALIDSpecification of digital content object storage, reuse and exchange—Part 2:Object encoding, storage and exchange
- Issued on:2020-03-31
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
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| Standard No: | GB/T 38371.2-2020 |
| Document status: | VALID |
| Title in English: | Specification of digital content object storage, reuse and exchange—Part 2:Object encoding, storage and exchange |
| Title in Chinese: | 数字内容对象存储、复用与交换规范 第2部分：对象封装、存储与交换 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-03-31 |
| Implemented on: | 2020-10-01 |
| ICS Classification: | 35.240.30-IT applications in information, documentation and publishing |
| Chinese Classification: | L70-Information processing technology in general |
| Professional Classification: | GB-National Standard |
| Related Keywords: | digital content object storage
container-level exchange information package object-level exchange information package objects exchange interface implementation exchange part |
| Related Topics: | internal memory
elephant gb content gb/ content basketball object live GB/T 38371.2 GB/T 38371.2-2020 storage Ethernet storage switching universal Object storage equipment industry RC storage |
《GB/T 38371.2-2020数字内容对象存储、复用与交换规范 第2部分：对象封装、存储与交换》由TC553（全国新闻出版信息标准化技术委员会）归口，主管部门为国家新闻出版署(国家版权局)。
Introduction
Analysis of the standard core architecture
| Module | Technical points | Application scenarios |
|---|---|---|
| Packaging specification | Container-level/object-level dual-mode packaging, ZIP package structure contains mimetype verification file | Cross-system resource packaging and transmission |
| Storage solution | Support file system/relational database/graph database three storage methods | Long-term preservation of massive digital resources |
| Exchange interface | 9 types of standardized APIs, compliant with SRU/SRW protocols | Heterogeneous system data interoperability |
In-depth Analysis of Packaging Technology
The standard innovatively proposes a dual-track packaging mechanism of container-level exchange information package and object-level exchange information package:
- Container-level packaging: Applicable to composite resources such as books, including a complete metadata chain (manifest.xml) and media file directory structure
- Object-level packaging: For a single media object, it is simplified to a flat structure of instance file + data file
Typical packaging example
Container_001.zip/ ├── mimetype ├── META-INF/ │ ├── container.xml │ └── dcoomanifest.xml └── CONTAINER/ ├── dcoo_rdf_instance.xml └── dataFile/ ├── audio/example.mp3 └── image/cover.jpg
Comparison of Storage Solutions
| Storage Type | Advantages | Limitations | Applicable Scale |
|---|---|---|---|
| File System | Simple implementation, supports relative paths | Low query efficiency | <100,000 objects |
| Relational Database | Perfect transaction support | Complex table structure | 100,000-1,000,000 objects |
| Graph database | Naturally supports RDF graph model | High operation and maintenance cost | ＞1 million objects |
Exchange interface implementation guide
The 9 core interfaces defined by the standard constitute a complete service system:
- listIdentifiers: Resource identifier retrieval based on time range
- getEIP: Supports ZIP format exchange package download
- resRetrieve: Metadata retrieval compliant with the SRU protocol
Interface call example
HTTP GET /listContentURL?iri=urn:example:book_001 Response: <url value="http://server/data/image/cover.jpg"/> <url value="http://server/data/pdf/chapter1.pdf"/>
Standard Evolution Analysis
This standard inherits and develops from the OAIS reference model. The key innovations include:
- Defines the physical implementation specification of the DCOO ontology model in the Chinese environment for the first time
- Break through the limitations of traditional METS encapsulation and introduce RDF instance file storage solution
- Establish a metadata interoperability channel between the publishing industry and the library field
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