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Basic data
| Standard ID | GB/T 20533-2026 (GB/T20533-2026) |
| Description (Translated English) | Metadata for ecological scientific data |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | L67 |
| Classification of International Standard | 35.240 |
| Word Count Estimation | 102,189 |
| Date of Issue | 2026-02-27 |
| Date of Implementation | 2026-06-01 |
| Older Standard (superseded by this standard) | GB/T 20533-2006 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 20533-2026: Metadata for ecological scientific data
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 35.240
CCSL67
National Standards of the People's Republic of China
Replaces GB/T 20533-2006
Ecological science data metadata
Published on 2026-02-27
Implemented on June 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction V
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Abbreviations 3.
5.Metadata Description Methods 3.
6.Consistency Requirements 4
7.Metadata Requirements 4
7.1 Scope of Metadata Application Objects 4
7.2 Metadata and Dependencies 4
7.3 Class Diagram of Metadata Packages 5
7.4 Metadata Base Package 5
7.5 Metadata Dependency Package 11
7.6 Core Metadata of Ecological Science Data 14
7.7 Rules and methods for developing dedicated standards for metadata 14
7.8 Relationship between the metadata defined in this document and the core metadata of scientific and technological resources 14
7.9 Metadata Application Example 14
7.10 Metadata Implementation Methodology 14
Appendix A (Normative) Data Dictionary 15
A.1 Metadata Base Package 15
A.2 Metadata Dependency Package 49
A.3 Code Table and Enumeration 60
Appendix B (Normative) Metadata Extensions and Dedicated Metadata Standards 71
B.1 Background 71
B.2 Metadata Trimming 71
B.3 Types of Metadata Extensions 71
B.4 Principles and Methods of Metadata Extension 71
B.5 Metadata-Specific Standard 71
B.6 Methods and Rules for Developing Dedicated Standards for Metadata 72
Appendix C (Normative) Abstract Test Suite 73
C.1 Introduction 73
C.2 Existing Metadata Test Suite 73
C.3 User-defined extended metadata test suite 74
C.4 Metadata-Specific Standard Test Suite 75
Appendix D (Normative) Core Metadata 76
Appendix E (Informative) Comparison Table of Ecological Science Data Metadata and Core Metadata of Scientific and Technological Resources 77
Appendix F (Informative) Metadata Example 79
F.1 Overview 79
F.2 Dataset of Vegetation Aboveground Biomass in Typical Grassland and Desert Ecosystems in Arid and Semi-arid Regions of China (79 metadata)
Appendix G (Informative) Metadata Implementation 93
References 94
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document replaces GB/T 20533-2006 "Ecological Science Data Metadata". Compared with GB/T 20533-2006, the main differences are in the structural adjustments.
Aside from editorial changes, the main technical changes are as follows.
a) A definition for the term "ecological science data" has been added (see 3.1), and the terms "list data," "raster data," and "vector data" have been removed.
According to "database registration system", "encoding system", "lexical encoding system", "syntactic encoding system", "data type", "value range", "concept model"
"Formula", "Conceptual Model", "Domain of Discourse", "Model", "Data Model", and "Data Exchange Center" (see 3.1, 3.2, and 3.3 in the.2006 edition).
(3.12, 3.14, 3.15, 3.16, 3.18, 3.19, 3.20, 3.21, 3.22, 3.24, 3.25, 3.26), the term "metadata application specification" is further...
Change to "Metadata-specific standard" (see 3.10, 3.13 in the.2006 edition);
b) The descriptions of "UML model symbols," "UML model relationships," and "UML model stereotypes" have been removed (see the.2006 edition).
4.2, 4.3, 4.4);
c) The description of the metadata description method has been changed; the XMLSchema language form of the metadata description method has been removed, and the description will now focus on...
The description of metadata in UML model diagram form and data dictionary form is changed to referencing GB/T 30522-2014.
For details of the relevant chapters (see Chapter 5, Chapter 6 in the.2006 edition);
d) The packages that make up the metadata of ecological science data and the dependencies between packages have been changed (see 7.2,.2006 version 7.2);
e) The metadata information package has been modified (see 7.4.1, 8.1.1 of the.2006 version), and the identification information package has been modified (see 7.4.2,.2006 version).
Version 8.1.2) modifies the data entity information package (see 7.4.3, version 8.1.9 of.2006) and the method information package (see 7.4.4).
Version 8.1.4 (2006) modified the data quality information package (see 7.4.5, version 8.1.3 (2006)) and added shared service information.
The information package (see 7.4.6) has been updated, and a labeling information package (see 7.4.7) has been added. The site information package (see 8.1.5 in the.2006 version) and the project information package have been deleted.
Information package (see 8.1.6 of the.2006 edition), distribution information package (see 8.1.7 of the.2006 edition), metadata reference information package (see...)
8.1.8 (2006 edition), the space reference system information package (see 8.1.10 (2006 edition)), and the space representation information package (see.2006 edition)
Version 8.1.11);
f) Added an identifier information package (see 7.5.1), modified the responsible party information package (see 7.5.3, 8.2.1 of the.2006 version), and modified the overlay...
The scope information package (see 7.5.4, 8.2.2 in the.2006 version) has been expanded, a supplementary file information package (see 7.5.5) has been added, and the data volume has been removed.
Information packets (see 8.2.4 of the.2006 edition) and file format information packets (see 8.2.5 of the.2006 edition);
g) The data dictionary corresponding to the UML model diagram in the metadata base package has been modified (see A.1,.2006 edition of A.1);
h) The data dictionary corresponding to the metadata dependency package UML model diagram has been modified (see A.2,.2006 version of A.2);
i) The encoding method of the codes in the code table has been changed (see A.3, A.3 of.2006). The "Data Entity Type Code" and "Job Title Code" have also been changed.
The code composition of "responsibility code" and "association type code" (see A.3.4, A.3.6, A.3.9, and A.3.2 and A.3.5 of the.2006 edition).
A.3.12) added "Intellectual Property Category Code", "Associated Resource Type Code", "Raster Type Code", "Color Code", and "Data".
"Collection Method Classification Code", "Observation Method Code", "Observation Location Code", "Site Type Code", "Site Shape Code", "Sample Classification"
Thirteen code tables, including "Class Code," "Shared Scope Code," "Shared Path Code," and "Identifier System Code," are listed (see A.3.5, A.3.8, etc.).
A.3.13, A.3.14, A.3.15, A.3.16, A.3.17, A.3.18, A.3.19, A.3.20, A.3.22, A.3.23, A.3.24); delete
The codes included "security classification code", "fund source code", "media name code", "relationship base code", "band organization method code", and "byte order".
Sequence code, dimension name type code, pixel location code, topological level code, imaging condition code, and subject classification code.
Twelve code tables, including "Research Subject Code" (see A.3.7, A.3.10, A.3.11, A.3.13, A.3.15, etc., in the.2006 edition), are included.
A.3.16, A.3.17, A.3.20, A.3.21, A.3.23, A.3.24, A.3.25);
j) The description of the methods and rules for metadata extensions and the development of metadata-specific standards has been revised (see Appendix B, Appendix.2006 edition).
Record B);
k) The composition of the core metadata of ecological science data has been changed (see Appendix D, Appendix E of the.2006 edition);
l) The special rule for applying full dataset metadata has been removed (see Appendix D of the.2006 edition).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the Ministry of Science and Technology of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee on Standardization of Science and Technology Platforms (SAC/TC486).
This document was drafted by. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences; National Science and Technology Infrastructure Center; Nanjing University; China
Computer Network Information Center of the Chinese Academy of Sciences, China National Institute of Standardization, Institute of Botany of the Chinese Academy of Sciences, Nanjing Institute of Soil Science of the Chinese Academy of Sciences
Institute of Atmospheric Physics, Chinese Academy of Sciences, and Tianjin Normal University.
The main drafters of this document are. He Honglin, Su Wen, Xu Bo, Hou Yanfei, Guo Xuebing, Li Jianhui, Zhang Li, Ren Xiaoli, Hu Lianglin, and Wang Zhiqiang.
Wu Dongxiu, Pan Xianzhang, Hu Bo, Xu Wenting, Guo Xinyan, Meng Weiqing.
The release history of this document and the document it replaces is as follows.
---First published in.2006 as GB/T 20533-2006;
---This is the first revision.
Introduction
Currently, a series of global resource and environmental issues, such as global change and sustainable development, are becoming increasingly severe, attracting international attention and scientific scrutiny.
Research focus in ecology is shifting from small-scale individual, community, and ecosystem studies to regional, continental, and even global scales. Ecosystems
Systematic observation has also gradually shifted from short-term, location-based, and small-scale collaborative observations to long-term, regional, and even large-scale, networked observations.
The focus is shifting towards integrated three-dimensional observation, encompassing space, air, and ground. Data acquired by ecosystem observation research institutes is gradually moving away from primarily traditional numerical data.
The trend is towards multimodal data coexistence. Simultaneously, with the development of big data and artificial intelligence technologies, data-driven approaches, artificial intelligence, and ecology are intersecting.
The development of new integrated scientific research paradigms is in full swing. These changes urgently require improvements in the management, sharing, and application of ecological science data.
In recent years, especially since the promulgation of my country's "Measures for the Management of Scientific Data" in.2018, a series of new national standards in related fields have been successively issued.
Cloth, such as GB/T 32843-2016 "Science and Technology Resource Identification", GB/T 35294-2017 "Information Technology Scientific Data Citation", GB/T 30523-
2023 "Core Metadata of Scientific and Technological Resources", GB/T 43705-2025 "Guidelines for Classification and Grading of Scientific Data Security", etc. Internationally, in the field of ecology...
This also presents new challenges for the management and sharing of scientific data in the field of ecology, including data security, intellectual property protection, and international alignment.
Requirements.
Ecological science data serves as the foundation for innovation in ecological science research; its value is influenced by factors such as data scale, quality, management, and the level of sharing services.
Metadata standards are a crucial factor in the effective management of ecological science data and the key to its sharing and application.
GB/T 20533-2006 "Metadata of Ecological Science Data" has played a significant role in the management and sharing of ecological science data in my country over the past nearly 20 years.
It has played an important role, but its content is no longer suitable for the new situation and new requirements, and it urgently needs to be revised.
This document targets hierarchical ecological science data and describes the structure of general metadata using UML model diagrams and data dictionaries.
This document defines the composition of core metadata for ecological science data and outlines the rules and methods for developing dedicated metadata standards. This document can serve as a reference for ecological...
Scientific data centers for various fields, ecosystem field scientific observation and research stations, and other facilities related to the production, management, and service of ecological science data.
For organization and individual use. This document guides relevant departments or institutions in my country to establish a networked and intelligent ecological science data management system accessible to the entire society.
The rationalization and sharing service system plays a vital supporting role. The implementation of this document will contribute to the construction and accumulation of ecological science data resources in my country, and promote...
Standardized management of ecological science data will improve the level of sharing and utilization of ecological science data.
Ecological science data metadata
1 Scope
This document defines a conceptual model for describing ecological science data at the dataset level, and establishes a set of mandatory components that constitute this model.
Required and optional subsets of metadata, metadata entities, and metadata elements; the minimum metadata required for various levels of requirement applications.
The data element set (referred to as core metadata) and the rules for extending metadata and developing metadata-specific standards to meet special needs.
It then describes a method for developing dedicated standards for metadata.
This document applies to the cataloging, description, and standardized management of ecological science datasets and dataset series, and also to scientific data centers.
Data services.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 4880 (all parts) Language Name Code
GB/T 7408 (all parts) Representation for the Interchange of Date and Time Information
GB/T 7714 Rules for Bibliographic References in Information and Documentation
GB/T 30522-2014 Basic Principles and Methods for Standardization of Metadata for Science and Technology Platforms
GB/T 30523-2023 Core Metadata of Scientific and Technological Resources
GB/T 32843-2016 Science and Technology Resource Identification
GB/T 35294-2017 Information Technology Scientific Data Citation
GB/T 36369-2018 Unique Identifier System for Digital Objects in Information and Documents
GB/T 39908-2021 Code set for the transfer of scientific data generated by science and technology programs
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
In ecological scientific research activities, raw basic data are obtained through observation, experimentation, surveys, and other methods, as well as data collected according to research needs.
The term refers to all derivative data generated from the processing, analysis, and application of original basic data and other collected data.
3.2
dataset
A recognizable set of data.
Note. By restricting the coverage or attribute type, a dataset can physically become a smaller data group within a larger dataset.
[Source. GB/T 19710.1-2023, 3.3, with modifications]
3.3
Dataset series
A collection of datasets that share common characteristics.
...
