BS ISO 19848:2018 pdf free

BS ISO 19848:2018 pdf free.Ships and marine technology – Standard data for shipboard machinery and equipment
Local ID, meanwhile, is for identifying on-board Data Channel locally. For instance, on-board computer systems, such as the Integrated Automation System (IAS) and the Alarm Monitoring System (AMS), have their own Data Channel List, which is composed of unique Channel ID. This Channel ID can correspond to Local ID.
Short ID is an optional short alternative identifier of Local ID for usability and data compression. This short identifier, for instance, can be used as Data Channel identifier in the Time Series Data format.Local ID and Short ID shall be unique for a ship.These IDs shall be case-insensitive to avoid unexpected mistyping.
NOTE Data Channel of the same kind of sensors on different ships is expected to have a same Local ID.Conversely, even if Data Channel has a same meaning, Short ID may be different for each ship.
Universal ID is an URI conforming to the requirements below, in addition to those of the URI definition.The URI definition allows for many different compositions, but the Universal ID will be a subset of these and shall be in the following format.
The “authority” and “unreserved” element is defined in the URI definition. The “protocol” element is optional.
NOTE 1 Though path element of URI that is defined in RFC 3986 accepts much more characters, such as RFC 3986 “sub-delimiters”,“:”, “@”, etc., this document only accepts RFC 3986 “unreserved” characters since these characters may be used as control character in ISO 19847. (Definition of sub-delimiters and unreserved are defined in RFC 3986).
Update Cycle represents the cycle of updating measurement value. This sub-property shall be used when measurement value is updated periodically.When a value of Data Channel is a result of calculation that uses measurement value of specific time periods, Calculation Period shall be used to describe the said period. Update Cycle and Calculation Period shall be described with a decimal number that is larger than zero. The unit of Update Cycle and Calculation Period shall be the “second”.BS ISO 19848 pdf free download.