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GB/T 18142-2017: Information technology -- Representation of data elements values -- Notation of the format
Status: Valid GB/T 18142: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 18142-2017 | English | 179 |
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Information technology -- Representation of data elements values -- Notation of the format
| Valid |
GB/T 18142-2017
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| GB/T 18142-2000 | English | 319 |
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Information technology. Notation of format for data element values
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GB/T 18142-2000
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PDF similar to GB/T 18142-2017
Basic data | Standard ID | GB/T 18142-2017 (GB/T18142-2017) | | Description (Translated English) | Information technology -- Representation of data elements values -- Notation of the format | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L72 | | Classification of International Standard | 35.020 | | Word Count Estimation | 9,998 | | Date of Issue | 2017-11-01 | | Date of Implementation | 2018-05-01 | | Older Standard (superseded by this standard) | GB/T 18142-2000 | | Regulation (derived from) | National Standard Announcement 2017 No. 29 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 18142-2017: Information technology -- Representation of data elements values -- Notation of the format
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Information technology-Representation of data elements values-Notation of the format
ICS 35.020
L72
National Standards of People's Republic of China
Replacing GB/T 18142-2000
Information Technology Data Element Value Represents format notation
(ISO /IEC 14957.2010, IDT)
Posted.2017-11-01
2018-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Directory
Foreword Ⅲ
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
Notation associated with the character type and length represented by the data element
Appendix A (informative) EBNF syntax for data element description 4
Reference 5
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 18142-2000 "Information technology data element value format notation," and GB/T 18142-2000 phase
Than, in addition to editorial changes outside the main technical changes are as follows.
--- Changed the traditional simple format notation, using the C language to express;
--- Increasing the programming language (GB/T 15272) to use the notation standard (see introduction);
--- Modify the normative references (see Chapter 2);
--- Modify the original traditional simple format notation, using the C language to express (see Chapter 4);
--- Removed the "number of additional notation" (see GB/T 18142-2000 Chapter 5).
This standard uses the translation method identical with ISO /IEC 14957.2010 "Information technology data element value representation format notation."
Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents.
This standard by the National Information Technology Standardization Technical Committee (SAC/TC28) and focal point.
This standard was drafted. China Electronics Standardization Institute, Fortis ICT Technology Development Co., Ltd..
The main drafters of this standard.Wang Jing, Zhang Zhanxin, Gao Shuang, Liu Weishan, Zhao Jinghua, Fan Xing.
This standard replaces the previous version of the standard distribution.
--- GB/T 18142-2000.
Introduction
In business, technology and public domain, data exchange is rapidly expanding. It has led to a growing number of different groups working together; and these
Groups have often independently developed information processing applications and telecommunications networks to meet specific needs. Therefore, the global consistency is poor.
In order to remedy this situation, it is necessary to carry out much-needed standardization specifically for data element representations.
For a representation of a data element, consider first the format (ie, the type of character used in the data element representation and the length of the representation) plus
To regulate. In order for these norms to have the same meaning for everyone involved, it is necessary to express these norms in accordance with standardized conventions.
These rules may eliminate ambiguities, inaccuracies and errors; and facilitate the comparison of various data element dictionaries, the design and creation of information systems,
And Electronic Data Interchange (EDI).
In some other standards, some of these notations are expressed in a specific context, for example, EDIFACT
(ISO 9735), financial standards (eg ISO 7982-1), character sets (GB/T 15273), information processing (GB/T 15273), programming languages
(GB/T 15272).
The intent of this standard is to provide the only source of reference on this topic for all those standards that make use of notations that are not environment-related.
Information Technology Data Element Value Represents format notation
1 Scope
This standard specifies the notation used to describe the format (ie, the type of characters used in data element representations and the length of these representations)
Set an additional notation for numbers. For example, this formatting technique may be used for the metadata portion of a data element.
The scope of this standard is limited to graphic characters, such as numbers, letters and special characters. And limited to characters, strings, integers, real numbers
And pointers to these basic data types.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
Information technology - Universal Multi-octet Encoding Character Set (UCS) (ISO /IEC 10646.2003, IDT)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Data element dataelement
In this context, it is considered an indivisible unit of data.
[GB/T 5271.4-2000, Definition 04.07.01]
3.2
Character set characterset
A finite set of characters, and it is complete for a given purpose.
[GB/T 5271.4-2000, Definition 04.01.02]
3.3
Character type charactertype
A collection of characters of the same kind or of the same use.
Examples. Letters, numbers, special characters, etc.
3.4
Length length
Lengthofrepresentation
The number of characters used to represent a data element.
4 Notation associated with the character type and length represented by the data element
The format should be a string sequence. The format consists of zero or more indicators, including one or more spacers (GB/T 13000-
2010 Article 20), an ordinary character (neither% nor spacers), or a conversion specification. Each conversion note consists of words
Beginning of symbol%.
Note This format specification is based on the function "fscanf ()" in the C programming language (ISO /IEC 9899.1999).
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