ISO 19848:2024

International
Standard
ISO 19848
Second edition
Ships and marine technology —
2024-02
Standard data for shipboard
machinery and equipment
Navires et technologie maritime — Données normalisées pour les
machines et équipements à bord des navires
Reference number
© ISO 2024
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 3
5 Data Channel . 4
5.1 Data Channel ID .4
5.1.1 General .4
5.1.2 Universal ID .4
5.1.3 Local ID .5
5.1.4 Short ID .6
5.1.5 Example of Data Channel ID .6
5.2 Data Channel Property .7
6 Time Series Data .12
6.1 General . 12
6.2 Type of Time Series Data . 12
6.2.1 General . 12
6.2.2 Tabular Data . 12
6.2.3 Event Data . 12
6.3 Time Series Data Composition . 13
7 Data structure .13
7.1 General . 13
7.2 Implementation language .14
7.3 Standard data types .14
7.4 Structure of Data Channel List .14
7.4.1 Data model .14
7.4.2 Logical structure . 15
7.5 Structure of Time Series Data . 20
7.5.1 Data model . 20
7.5.2 Logical structure .21
Annex A (normative) General requirement of data implementation .26
Annex B (informative) Examples of Local ID definitions — jsmea_codebook .51
Annex C (informative) The “dnv-v2” naming scheme — explanations and examples of LocalID
definitions .108
Bibliography .135

iii
Foreword
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in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 6, Navigation and ship operations.
This second edition cancels and replaces the first edition (ISO 19848:2018), which has been technically
revised.
The main changes are as follows:
— Annex A has been updated to define JSON as an equivalent implementation alternative to XML for
DataChannelLists and TimeSeriesData. JSON schemas have been introduced to ensure precise definition
and validation.
— The example of the codebook in B.2 has been extended to include navigational information, voyage
information, weather information around the ship, oil property information and ship motion information.
— In B.3, a full set of standard data names has been added as references, to improve usability.
— In Annex C, the naming scheme has been changed from from “dnvgl-vis” to “dnv-v2”, as well as various
updates to the rules for constructing the LocalID.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
Introduction
On-board computer applications for safety and energy-efficient operations have become increasingly
popular. These applications require access to the data of shipboard machinery and equipment.
To access data of navigational equipment, the IEC 61162 series, which covers data exchange, can be used.
However, there are no existing standards covering the access of data from other on-board components and
systems (e.g. machinery, safety equipment, and hull).
Exchanging nonstandardized data between and/or among applications requires name-based aggregation
and format mapping. However, this involves a large amount of labour, which hinders the use of such data.
To improve such situations, this document defines unified requirements and guidelines for developing
machine and human-readable identifiers and data structures for shipboard machinery and equipment, with
the objective of facilitating the exchange and processing of sensor data from ships.
This document defines two concepts and their models for data exchange: one is Data Channel, and the
other is Time Series Data. This document thus defines two distinct data structures and file formats: A Data
Channel List, which contains the necessary meta-data, and a Time Series Data format for measurements.
The time-series format is designed to be lightweight and therefore contains minimal meta-data information,
only in the form of a reference to the channel list.
Data Channel is a concept that represents virtual data transmission channels, and defines time-invariant
properties. Data Channel can be viewed as a static description for the different sensor data streams. Data
Channel is composed of Data Channel ID and Data Channel Property. Data Channel ID uniquely identifies the
logical data channels. Data Channel Property defines attributes of Data Channel.
The purpose of this document is to provide guidance and requirements on exchanging data on board a ship.
However, in the future, it is possible that shipboard machinery and equipment will be connected directly to
the Internet.
Therefore, considering the compatibility between Data Channel ID and URLs, which are used to identify
data on the Internet, Data Channel ID has a hierarchical structure with slashes as delimiters. To represent a
hierarchy, Data Channel is categorized in accordance with the standardized naming scheme, called Naming
Rule, and named by concatenating these category names with slashes.
Annexes B and C provide two types of naming scheme, an example of a codebook and lists of standardized
category names given according to these schemes.
These naming schemes provided in Annexes B and C are not designed to unify Data Channel ID, but it is
assumed that some entities will develop, maintain and manage codebooks and that these codebooks will be
disclosed widely.
Data Channel Property is assumed to be used
...