Results for area 1.4 Variables and data
data type of atomic nature
data concept that defines a grouping of data elements and/or data frames
defining aspect of a value
addressable package of data consisting of a single data element or structured sequences of data elements
descriptive information of services
averaged number of erroneous bits relative to the total number of transmitted bits
specific point location that is thought useful or interesting
EXAMPLE A point on the Earth’s representing the location of a monument or of hotels, campsites, fuel stations or any other categories often used in navigation systems.
NOTE 1 to entry A POI may lie outside the road network. An access point is a point on the road network in order to access this POI.
value calculated from vehicle speed v and clearance c by τ = c/v
NOTE 1 to entry v is the subject vehicle speed and c the distance between the subject vehicle and the forward vehicle.
data type whose range is a list of predefined values, called enumeration literals
information about services, which is supplied by third party data providers (e.g. tourist or motoring organizations), typically with a rich content of descriptive data
class of closely related attributes
description of the organization of data in a manner that reflects an information structure
NOTE See also information model.
unit of data that is considered in a given context to be indivisible and which includes an unambiguous representational form
NOTE 1 to entry This definition states that a data element is “indivisible” in a given context. This means it is possible for a data element considered indivisible in one context [e.g. location] to be divisible in another context (e.g. latitude, longitude, and elevation).
specific grouping of data elements that describes information of interest through a useful grouping of more atomic properties about one or more classes
NOTE 1 to entry The grouping can be a set, sequence or a choice.
NOTE 2 to entry A data frame can contain other data frames.
set of distinct values, characterized by properties of those values and by operations on those values
geodetic longitude angle from the prime meridian plane to the meridian plane of a given point, eastward treated as positive
defined period of time in which the system is available
period after which the data objects can be considered to be no longer valid
time between two instants
uniquely identified unit of information for human use
EXAMPLE A report, specification, manual or book, in printed or electronic form.
NOTE 1 to entry A document can be a single information item, or part of a larger information item.
[SOURCE: ISO/IEC/IEEE 15289:2019, 3.1.10]
speed set by an authority which it considers appropriate to the road, traffic, or environmental conditions
being experienced
recommended terrestrial reference system for Europe and coincident with ITRS at the epoch 1989
NOTE Unlike ITRS, ETRS is centred on the stable part of the European plate and not subject to change due to continental drift in most of Europe.
one of the sequences of two (or three) numbers designating the position of a point, expressed in geodetic latitude, geodetic longitude and (in the three-dimensional case) ellipsoidal or gravity-related height
geocodes are unique identifiers unmistakably defining important points on road networks; geocodes can be derived from /converted into WGS 84 co-ordinates by the algorithm described in CEN/TS 14821-3
optional indication of the correctness and accuracy of the attributes of the vigilance information
NOTE 1 to entry The exact definition of the levels strongly depends on the offer of the vendor as well as the needs of the customer and hence is a matter of negotiation.
message that indicates issues with cross-jurisdictional compatibility, scope coverage service or service availability
unambiguously distinguishes an attribute from all other attributes within the same element
occurrence of a message containing the actual values for the data elements and/or data frames
interval of data update
complete sequence of octets used to represent a data value
abstract, formal representation of many kinds of real-world objects, e.g. business documents, orders, transportation mechanisms, e.g. trucks, containers, ship bays, and/or abstract objects, e.g. for the entities used in a billing system
NOTE 1 to entry The objects have a name, properties and relationships to other objects. An information model provides a means to describe the information in a domain of interest without constraining how that description is mapped to an actual implementation in software.
degree to which a set of inherent characteristics fulfils requirements
NOTE 1 to entry User requirements can include ease of use, safety, availability, reliability, sturdiness, economy, and environmental safety. Such requirements can be explicit or implicit.
group of parameter (reliability, availability, maintainability) which are able to define the quality of EFC equipment by qualitative and quantitative figures
specification of a location relative to a linear element as a measurement along that element
maximum allowed power within a defined frequency band emitted by the RSU transmitter
maximum amount of time a system is given to provide an appropriate response to the incoming data packet
time since 00:00:00 UTC, 1 January, 2004, identical with UTC except that no leap seconds need to be added
set of basic messages that are normally used in business-oriented applications
time variant parameter whose value is unpredictable
documenting characteristic of a data concept that is provided in a message
NOTE 1 to entry Documenting characteristics are termed “meta-attributes” when stored in a DD, but are termed metadata when provided within the same message instance as the actual value. For example, a data element may
be defined within the DD with a specific unit of measure, such as meters; the Unit of Measure field is a defined meta-attribute. Alternatively, the unit of measure may be defined at runtime within a message, especially for items such as unit of currency. The field within a message that defines the unit of currency for an included value
would be termed “metadata”.
range of integers specifying the allowable cardinalities for an instantiation of an element
NOTE 1 to entry The upper bound of the range cannot be below the lower bound. The lower bound shall be a nonnegative integer. The upper bound shall be a nonnegative integer or the special value unlimited, which indicates there is no upper bound on the range.
number and values of the downlink carrier frequencies, which are equal to the frequencies of the continuous wave CW, transmitted by the RSU and used by transponder OBUs for uplink communication; each carrier frequency is the centre frequency of a downlink channel
a methodology based on objects, classes and messages between objects
a set of permissible values
percent of time that a detector indicates a vehicle is present over a total time period
scale of measurement of data, according to which the differences between values can be quantified in absolute but not relative terms and for which any zero is merely arbitrary
NOTE Interval scaled parameters are applicable in mathematical equations using the operators plus or minus. Interval scales having a zero offset are equal to ratio scales.
EXAMPLE The temperature scale in Celsius is an interval scale, in Kelvin it's a ratio scale.
PDU generated by the Security Subsystem for purposes of establishing the authorisation status of a peer ITS-S application process
period over which the values are determined
the roadway radius of curvature is the horizontal radius of curvature of the road on which the subject vehicle is travelling
element of the run-time extension of an Enumeration data type
NOTE It has no relevant substructure, that is, it is atomic. The enumeration literals of a particular Enumeration data type are ordered.
discrete classification of data, in which data are neither measured nor ordered but subjects are merely allocated to distinct categories
NOTE Nominal scaled parameters are applicable in Boolean equations using the operators equal or not equal.
EXAMPLE A nominal scale parameter for vehicles could consist of cars, trucks, vans and motorcycles.
descriptive word or group of words that uniquely labels a data concept within a module
rules which specify the representation during transfer of the values of ASN.1 types
NOTE 1 Encoding rules also enable the values to be recovered from the representation, given knowledge of the type.
NOTE 2 For the purpose of specifying encoding rules, the various referenced type (and value) notations, which can provide alternative notations for built-in types (and values), are not relevant.
standardized determination of data encoding to conform to the requirements of ISO 8824, ASN.1
NOTE The Basic Encoding Rules are given in ISO 8825.
standardized determination of data encoding to conform to the requirements of ISO 8824 ASN.1 data notation
NOTE 1 : The packed encoding rules are given in ISO 8825.
NOTE 2 : There are alternate forms of encoding, such as basic encoding rules (BER). Within ITS standards, reference to ASN.1 also implies the use of packed encoding rules as specified in ISO 8825.
container for attributeValues (OCTET STRING) with the length equal to zero
content of the electronic business transactions exchanged described with an aim to function as part of a formal agreement
consistent and standardised set of cross layer parameters in a specific DSRC implementation identified by a unique number
identification, version and date of the spatial data set used
term used to describe different operational component properties/specifications
number of bits per second, independent of the data coding
meta-data which define what time stamping is applied to the data objects
the lower and upper optical wavelength describe the optical bandwidth of an IR radiátor; both the lower and upper optical wavelength of an IR radiator are defined by the reduction of the peak intensity by 3dB, taking into account the effects of temperature and component deviations
infrastructure framework for the agreement between a service provider and a user
complex attribute attribute consisting of two or more atomic values and/or attributes
logical set of data elements selected by semantic relation
NOTE Data set is used only for better understanding and is fully independent from implementation solutions.
the probability of the data value being correct (within the bounds of any stated accuracy)
speed of a vehicle that exceeds speeds typical of pedal cycles but can be reached on performance pedal cycles in short bursts or by performance riders
EXAMPLE SAE J3194 associates this with a top speed in the range of 32 km/h to 48 km/h.
NOTE 1 to entry Local regulations for the exact speed range vary.
mean time to repair the service (MTTR) fault and bring the service back into operation
geodetic latitude angle from the equatorial plane to the perpendicular to the Earth through a given point, northwards treated as positive
a coding method
means of denoting the type of each ASN.1 type
categorization of the kind of data concept
number of seconds passed since 1st January 1970, 00:00 (UTC)
NOTE This format is also known as “UNIX time”.
estimation of an upper bound for the error made on a position or velocity component (e.g. the plane position) associated with a given probability called integrity risk
an object's speed and direction of motion
NOTE 1 to entry Velocity is a physical vector quantity; both magnitude and direction are needed to define it.
The scalar absolute value (magnitude) of velocity is called speed, a unit whose quantity is measured in the
international system of units as metres per second (m/s).
predetermined width given to a lane when a visible lane marking exists only on one side of the lane and no other lane boundaries are detected by the system
maximum duration a system is required to wait for a response data packet prior to assuming that the previously sent data packet was never received by the other application
grouping of data elements, data frames, or data elements and data frames that is used to convey information
rate of change of velocity of an object with respect to time
NOTE 1 to entry Acceleration is a physical vector quantity; both magnitude and direction are needed to define it.
The unit of the scalar absolute value (magnitude) of acceleration is measured in the international system of units
as metres per second squared (m/s2).
identification of the location referencing standard used including any version and date