SIST EN 9300-007:2025
(Main)Aerospace series - LOTAR -LOng Term Archiving and Retrieval of digital technical product documentation such as 3D, CAD and PDM data - Part 007: Terms and references
Aerospace series - LOTAR -LOng Term Archiving and Retrieval of digital technical product documentation such as 3D, CAD and PDM data - Part 007: Terms and references
This document defines the common terms, abbreviations and references used throughout the EN 9300 series of standard parts.
Luft- und Raumfahrt - LOTAR - Langzeit-Archivierung und -Bereitstellung digitaler technischer Produktdokumentationen, wie zum Beispiel von 3D-, CAD- und PDM-Daten - Teil 007: Begriffe und Verweisungen
Série aérospatiale - LOTAR - Archivage long terme et récupération des données techniques produits numériques telles que CAD 3D et PDM - Partie 007 : Termes and réferences
Le présent document définit les termes, les abréviations et les références communs utilisés dans l’ensemble des parties de la série de normes EN 9300.
Aeronavtika - LOTAR - Dolgoročno arhiviranje in pridobivanje digitalne tehnične dokumentacije o proizvodih, kot so podatki 3D, CAD in PDM - 007. del: Izrazi in reference
Ta dokument opredeljuje skupne izraze, okrajšave in sklice, ki se uporabljajo v skupini standardov EN 9300 za standardne dele.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Aeronavtika - LOTAR - Dolgoročno arhiviranje in pridobivanje digitalne tehnične
dokumentacije o proizvodih, kot so podatki 3D, CAD in PDM - 007. del: Izrazi in
reference
Aerospace series - LOTAR -LOng Term Archiving and Retrieval of digital technical
product documentation such as 3D, CAD and PDM data - Part 007: Terms and
references
Luft- und Raumfahrt - LOTAR - Langzeit-Archivierung und -Bereitstellung digitaler
technischer Produktdokumentationen, wie zum Beispiel von 3D-, CAD- und PDM-Daten -
Teil 007: Begriffe und Verweisungen
Série aérospatiale - LOTAR - Archivage long terme et récupération des données
techniques produits numériques telles que CAD 3D et PDM - Partie 007 : Termes and
réferences
Ta slovenski standard je istoveten z: EN 9300-007:2025
ICS:
01.110 Tehnična dokumentacija za Technical product
izdelke documentation
35.240.30 Uporabniške rešitve IT v IT applications in information,
informatiki, dokumentiranju in documentation and
založništvu publishing
49.020 Letala in vesoljska vozila na Aircraft and space vehicles in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 9300-007
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2025
EUROPÄISCHE NORM
ICS 01.110; 35.240.30; 35.240.60; 49.020 Supersedes EN 9300-007:2017
English Version
Aerospace series - LOTAR - LOng Term Archiving and
Retrieval of digital technical product documentation such
as 3D, CAD and PDM data - Part 007: Terms and definitions
Série aérospatiale - LOTAR - Archivage long terme et Luft- und Raumfahrt - LOTAR - Langzeit-Archivierung
récupération des données techniques produits und -Bereitstellung digitaler technischer
numériques telles que CAO, 3D et PDM - Partie 007 : Produktdokumentationen, wie zum Beispiel von 3D-,
Termes et définitions CAD- und PDM-Daten - Teil 007: Begriffe und
Definitionen
This European Standard was approved by CEN on 7 April 2025.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 9300-007:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 General terms, definitions and abbreviations. 5
3.1 Terms and definitions . 5
3.2 Abbreviations . 36
4 Applicability . 39
Bibliography . 40
European foreword
This document (EN 9300-007:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical text
or by endorsement, at the latest by November 2025, and conflicting national standards shall be
withdrawn at the latest by November 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
[This document supersedes EN 9300-007 :2017.]
The main changes with respect to the previous edition are as follows:
— EN 9300-007 (P1), 10/2017:
o updated to reflect definitions in other current parts of the EN 9300 series;
o updated to act as the source for shared definitions to be referenced in all parts of the EN 9300
series going forward.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Introduction
This document was prepared jointly by AIA, ASD-STAN, PDES, Inc. and the prostep ivip Association.
The prostep ivip Association is an international non-profit association in Europe. For establishing
leadership in IT-based engineering it offers a moderated platform to its nearly 200 members from leading
industries, system vendors and research institutions. Its product and process data standardization
activities at European and worldwide levels are well known and accepted. The prostep ivip Association
sees this standard and the related parts as a milestone of product data technology.
PDES, Inc. is an international non-profit association in the US. The mission of PDES, Inc. is to accelerate
the development and implementation of ISO 10303, enabling enterprise integration and PLM
interoperability for member companies. PDES, Inc. gathers members from leading manufacturers,
national government agencies, PLM vendors and research organisations. PDES, Inc. supports this
standard as an industry resource to sustain the interoperability of digital product information, ensuring
and maintaining authentic longevity throughout their product lifecycle.
Readers of this document should note that all standards undergo periodic revisions and that any
reference made herein to any other standard implies its latest edition, unless otherwise stated.
The standards will be published under two different standards organisations using different prefixes.
ASD-STAN will publish the standard under the number EN 9300–xxx. AIA will publish the standard under
the number NAS 9300–xxx. The content in the EN 9300 series and NAS 9300 documents will be the same.
The differences will be noted in the reference documentation (i.e. for EN 9300 Geometric Dimensioning
and Tolerancing will be referenced in ISO 1101 and ISO 16792, and for NAS 9300 the same information
will be referenced in ASME Y14.5 and ASME Y14.41). The document formatting will follow that of the
respective editorial rules of ASD-STAN and AIA.
NOTICE — There may be differences between EN 9300 series and NAS 9300 series standards in the
bibliography due to separate regulatory requirements and government statutes.
1 Scope
This document defines the common terms, abbreviations and references used throughout the EN 9300
series of standard parts.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 9300 (all parts), Aerospace series — LOTAR — LOng Term Archiving and Retrieval of digital technical
product documentation such as 3D, CAD and PDM data
ISO 14721, Space data and information transfer systems — Open archival information system (OAIS) —
Reference model
3 General terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 9300 (all parts) and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
This subclause provides a list of general terms that occur in the EN 9300 series, together with a
description of what the terms mean. As the meaning of a term may change with context, this subclause
records the usage of those terms in the context of the EN 9300 series and is provided to enable the correct
interpretation of the EN 9300 series. These descriptions are not otherwise normative.
3.1.1
3D annotation
text, notes, flag notes, dimensions, tolerances, or geometric dimensioning and tolerancing (GD&T) that is
modelled in 3D space with leaders pointing to the solid model features
3.1.2
3D model-based definition/model-based definition
MBD
set of concepts, processes, and tools that allow the creation of an annotated 3D product definition based
on a 3D solid model
Note 1 to entry: The MBD data set includes all engineering intent requirements (including process specifications,
GD&T, product and manufacturing information (PMI), and other required information). Combined with PLM
attributes, a parts list, and general notes, this constitutes an authoritative, single source of master product definition
data that does not include or depend upon traditional 2D drawings; the MBD data set specifies complete
requirements for a product in its nominal condition as well as permissible limits of variation and other acceptance
criteria, providing all the data needed to plan, fabricate, and validate an article of product hardware.
3.1.3
access
process of recovering data from the archive
3.1.4
adhesive
substance used to bind two or more other components together via surface contact
Note 1 to entry: The adhesive can be a film, paste or liquid.
3.1.5
administration
management of the archive and its daily operation according to OAIS
3.1.6
administrator
organisation or person responsible for management of the archive and its daily operation
3.1.7
advanced composite structure
hybrid structure in which composite laminates of materials with high strength and stiffness with a resin
matrix (thermoset or thermoplastic) are used in combination with other components in order to create
a multi-functional design
Note 1 to entry: Other components can be core, fibre optics, active electronics, passive electronics, metal.
3.1.8
allowable
material strength, strain or load which can be used as a basis for generating a margin of safety
3.1.9
analysis and simulation model
single domain, multi-domain, or domain unspecific model which can be used to describe and validate the
functional architecture, or estimate the operational performance, control or behaviour of a component,
system or product
Note 1 to entry: A model is an assessment of temporal, physics-based, or mathematical properties. A model may
support the development or prototyping of production software, code generation and network integration. These
specialized models support design optimization, validation and reduce risk. Simulation models use the basis of the
analysis to represent the interactions between topologies, systems, subsystems or component designs based on
time or other event sequences.
3.1.10
anisotropic
exhibiting different properties along axes in different directions
3.1.11
application activity model
AAM
model of activities that specifies the context for a particular application protocol (AP)
[SOURCE: STEP; ISO 10303-11:2004]
3.1.12
application interpreted model
AIM
one of the STEP information models, historically used as the basis for implementation
3.1.13
application protocol
AP
one of the major parts of the standard that provides an implementable data exchange in a particular
context
[SOURCE: STEP; ISO 10303-11:2004]
3.1.14
application reference model
ARM
information model that describes the information requirements and constraints of a specific application
context
[SOURCE: STEP; ISO 10303-11:2004]
3.1.15
archival information package
AIP
information package consisting of the content information and the associated preservation description
information (PDI), which is preserved within an OAIS
Note 1 to entry: This is the package actually retained by the archive, containing both the content information and
all necessary PDI's.
3.1.16
archival storage
process which includes the setting of digital time signatures, generation of additional descriptive
information (DI) for archive information packages (metadata for the archive) and the physical storage of
the data within the archive
3.1.17
archive
system architecture for the management of historical information, and more specifically any repository
conforming to the OAIS standard
Note 1 to entry: In other words, the environment which usually supports at least the key functions of an archiving
architecture according to ISO 14721 (OAIS).
Note 2 to entry: This is the preferred sense in the LOTAR documentation.
3.1.18
article
see “product, part, item and article”
3.1.19
as fabricated
representation of a part as it is made by the prime or a supplier
3.1.20
as installed
representation of a part which shows how the part is deformed from its “as fabricated” configuration
when it is installed in an assembly
3.1.21
audit trail
information collected during the execution of a process that shows what actually occurred
3.1.22
authentication
ensuring something is what it claims to be
EXAMPLE More specifically in security, ensuring the claims to identity of one party are proven to the satisfaction
of another.
3.1.23
autoclave
sealed containment vessel used to induce a chemical reaction under heat and pressure
3.1.24
automated fibre placement
AFP
process by which a machine lays multiple courses of narrow tows on a form
3.1.25
automated tape laying or lamination
ATL
process by which a machine lays a series of single, wide tapes on a form
3.1.26
bag side
side of a composite part next to the vacuum bag during the cure cycle
Note 1 to entry: Thickness variation is pushed to this side of the laminate and away from the tool side.
3.1.27
band
grouping of tows that a fibre placement machine puts down on a layup surface at any one time
Note 1 to entry: The width of a band can be made wider or narrower during a single pass by adding or eliminating
tows.
Note 2 to entry: See “course”, 3.1.49.
3.1.28
bond assembly
part made up of composites and other components like core, fibre optics, active and passive electronics,
other systems and procured details that are bonded together to generate a detailed part
3.1.29
bridging
condition where plies span a chamfer or radius without generating full contact
Note 1 to entry: Bridging can be reduced with male tooling, larger radius tooling and pressure intensifiers.
3.1.30
broad goods
typically wide prepreg material (fabric or unidirectional) in roll format
3.1.31
business application
software creating and generating native product models
3.1.32
carbon fibre
high-strength fibre used in advanced composite designs
3.1.33
caul plate
secondary tooling on the bag side used to provide a smooth and controlled surface
3.1.34
certification
process of assessing a process or product against some particular set of criteria
Note 1 to entry: The particular process of certifying an aircraft type as being airworthy.
Note 2 to entry: For more clarity, LOTAR uses the term “type certification” in this context.
3.1.35
character-based presentation
type of presentation where the conveyed information is stored as characters
Note 1 to entry: Characters can be letters, numbers, and symbols.
Note 2 to entry: These characters are typically stored in a string variable that can be retrieved and edited in a
consuming application.
Note 3 to entry: The appearance of character-based presentation depends on the font being used and can change
if the originating system and the consuming application use different fonts.
Note 4 to entry: To ensure no characters are lost from creation to consumption, the alphabet (character encoding)
used is specified as well.
EXAMPLE In ASCII, the letter “A” is stored as character code '0x41' (hexadecimal).
Note 5 to entry: Character-based presentation is often supplemented by geometric elements, such as leader lines,
curves or terminator symbols.
3.1.36
co-bonding
joining together cured composites and other non-composite components (metal, systems, etc.) to an
uncured composite layup
3.1.37
co-curing
simultaneously bonding and curing assemblies of uncured composite details to one another
3.1.38
composite
material created from a fibre (or reinforcement) and a matrix material in order to maximize specific
properties, in which the constituents do not merge but retain their identities as they act in concert
3.1.39
composite inseparable assembly
design that contains the geometric definition of all of the composite plies along with the relative location
and stacking of any additional components
Note 1 to entry: At a minimum the plies will be specified by geometry, material and an orientation with a related
rosette.
Note 2 to entry: There can be core, pre- and co-cured definitions, stitching, pinning, systems, impact strips and
other embedded components.
3.1.40
composite material
two or more materials that are combined to form a useful engineering material that has properties not
found in the constituents which retain their identities in the composite process
3.1.41
composite part
definition that contains a solid representation of the cured part including holes, cutouts, chamfers, surface
treatments, and limited area application indicators (LAAIs)
Note 1 to entry: It uses the typical dimensioning practices with GD&T and PMI and is specified with a non-
homogenous material property.
Note 1 to entry: A best practice would be to create it as a separate data set with a “make from” note referencing
the related composite inseparable assembly but not containing any information about the plies, components or
materials that make it up.
3.1.42
configuration management
discipline of managing the information relating to a product design, encompassing change management,
configuration identification, the rules relating to the choice and combinations of options, status
accounting and audit
Note 1 to entry: This is the preferred sense in the aircraft industry, and in the EN 9300 series.
3.1.43
consumer
organisation, person, or client system, which interacts with the services offered by the archive to find
preserved information of interest and to access that information in detail
Note 1 to entry: In OAIS, a consumer is defined as the user of data taken from an archive.
Note 2 to entry: See also “designated community”.
3.1.44
content information
CI
set of information that is the original target of preservation
Note 1 to entry: In OAIS it is an information object comprised of its content data object and its representation
information.
EXAMPLE A single table of numbers representing, and understandable as, temperatures, but excluding the
documentation that would explain its history and origin, how it relates to other observations, etc.
3.1.45
context information
information that documents the relationships of the content information to its environment, including
why the content information was created and how it relates to other content information objects
3.1.46
core
internal item of a sandwich construction to which the sandwich faces or skins are attached
Note 1 to entry: The material can either be metal or non-metallic.
3.1.47
core model
essential minimum of data which are required to preserve the design intent for a given purpose
3.1.48
core ribbon direction
indicator that shows the direction of maximum shear strength and rigidity along the continuous webs of
material
3.1.49
course
head path and all the tows which are laid as a machine's head traverses the path
Note 1 to entry: See “band”, 3.1.27.
3.1.50
cross-linking
irreversible bonding of polymer chains that restricts movements between the chains and results in
significant changes to the mechanical properties
3.1.51
crossply
plies definitions in which different layers have orientations that cross each other
EXAMPLE A 0/90 layup.
3.1.52
cure
irreversibly change the properties of the binding resin in a composite layup
3.1.53
cured ply thickness
CPT
thickness of a ply after it has been cured and typically less than the uncured thickness
3.1.54
cyclic redundancy check
CRC
method for checking the integrity of a set of digital data
3.1.55
dart
wedge of material cut out of a ply in order to facilitate laydown without stretching or wrinkling
3.1.56
data
representation of information in a formal manner suitable for communication, interpretation, or
processing by human beings or computers
3.1.57
data object
collection of data treated as a single unit
EXAMPLE A CAD model or file.
3.1.58
data preparation
process done by the producers to prepare the data to be archived
Note 1 to entry: This includes data verification.
3.1.59
data selection
functions to search the archive for data
3.1.60
dated or undated reference
reference to a version-controlled document
Note 1 to entry: In a dated reference, the particular version is identified by its date of issue. In an undated
reference, the particular version is the latest released version.
3.1.61
delamination
post-cure separation of plies in a laminate causing reduced mechanical properties
3.1.62
description method
usually formal method of describing information and its structure
3.1.63
descriptive information
DI
set of information, consisting primarily of package descriptions, which is provided to data management
to support the finding, ordering, and retrieving of OAIS information holdings by consumers
Note 1 to entry: The information package, or DIP, derived from one or more AIPs, received by the consumer in
response to a request to the OAIS.
3.1.64
designated community
community for which the system is designed
Note 1 to entry: In the case of the EN 9300 series, it is the community that will use the information retained in an
archive.
3.1.65
digital signature
electronic signature
specified method to sign an object in electronic environments, providing the means to authenticate the
signatory and the signed object in an unambiguous and safe way by attaching to or logically associating
data in electronic form to other electronic objects
3.1.66
disaster recovery
recovery of the archive in the event of major failure or destruction of the archive
3.1.67
document
term covering a family of usages, from a physical paper document, through electronic files which can be
thought as representing a document, to synthetic view derived from multiple sources for which the user's
conceptual model is that of reading a document
3.1.68
domain-specific part
LOTAR parts 100 and above, which deal with the particularities of types of data such as 3D CAD, where
the domain is 3D CAD
Note 1 to entry: LOTAR parts (EN 9300-xxx) are either general or domain specific. The general parts (1 to 99)
apply to all types of data. LOTAR parts 100 and above are domain specific.
3.1.69
draping direction
direction perpendicular to the ply definition surface defining the direction in which the layers of plies will
be stacked-up
3.1.70
edgeband
laminate areas on a honeycomb sandwich part that are outside the edge of the core definition
Airbus Amber
3.1.71
engineering edge of part
EEOP
supplemental geometry represented in the dataset that specifies the engineering periphery of the part
Note 1 to entry: See “EOP”.
Note 2 to entry: This is in the STEP ISO 10303 standards as well as fibrecim.
3.1.72
engineering signature
digital signature with which the data producer asserts that the prepared data fits with the process and
quality requirements from the engineering point of view
3.1.73
engineering simulation
use of physics-based mathematical (numerical) models and/or logical models, including relevant data
derived from their physical model counterparts, as representations of a conceptual or real-world system,
phenomenon, or process in studying its technical requirements and operational behaviour
3.1.74
essential information
information to be preserved, as relating to the key characteristics (q.v.) of some aircraft component
3.1.75
evidential weight
in the case where electronic information is used as evidence in a court case, the degree of reliance that
the information is what it purports to be
[SOURCE: Code of Practice for Legal Admissibility]
3.1.76
explicit geometric representation
where each geometric element is defined in terms of the space it exists in
EXAMPLE A line is defined by its end points.
Note 1 to entry: In parametric geometry, the elements are defined through a construction procedure, so that if the
parameters change, the element itself changes - e.g. a line is defined as being the normal to a face from its centre.
Note 2 to entry: An explicit geometric element may be constructed manually by some procedure, but subsequent
changes to the starting entities of the procedure do not change the element.
3.1.77
explicit composite ply representation
representation where each ply element is defined in terms of the space it exists in, e.g., a ply is defined by
its 3D shape representation
Note 1 to entry: An explicit ply element may be constructed by using the implicit representation of the ply and
certain parameters (e.g. thickness), and the composite mechanism used to produce it.
Airbus Amber
3.1.78
EXPRESS
formal data modelling language
[SOURCE: STEP; ISO 10303-11:2004]
3.1.79
EXPRESS-G
diagrammatic form of “EXPRESS”
[SOURCE: STEP; ISO 10303-11:2004]
3.1.80
extensible mark-up language
XML
mark-up language, used to identify fields within a file that can be processed by a Web browser
Note 1 to entry: STEP ISO 10303 provides an XML binding for AP's.
3.1.81
fabric
cloth
material constructed of woven fibres
3.1.82
face sheet
laminate skin surrounding the core material in sandwich construction
3.1.83
fibre
homogeneous strand of material used as the main load carrying component of advanced composites
3.1.84
fibre content
percentage of fibre found in a composite part defined by weight or volume
3.1.85
fibre orientation
fibre direction
relative alignment of the fibres in a composite ply to the definition rosette assigned to that ply
3.1.86
filament
single strand of fibre
Note 1 to entry: Thousands are bundled together to create a tow.
3.1.87
file
named collection of data managed as a single unit at the level of a computer operating system
3.1.88
filler ply
ply that is not required for mechanical properties but is added for some other manufacturing or assembly
related requirement
3.1.89
first article inspection
FAI
process for the inspection, verification, and documentation of a representative item from the first
production run of a new part, or following any subsequent change that invalidates the previous first
article inspection result
3.1.90
fixity information
ancillary information that shows a particular set of information is unchanged
Note 1 to entry: According to OAIS, the information which documents the authentication mechanisms and
provides authentication keys to ensure that the content information object has not been altered in an
undocumented manner.
3.1.91
flat pattern
2D shape of a 3D contoured part whose boundary curve lengths are the same as the part in its formed
shape
3.1.92
functional architectural model
arrangement of functions, sub-functions and interfaces (internal and external) that specify the execution,
sequencing, conditions for control, data flow, and the performance needed to satisfy the requirements
baseline
3.1.93
geometric dimensioning and tolerancing
GD&T
definition of the physical dimensions of a component and the allowable variation on those dimensions
3.1.94
graphic presentation
type of presentation where the conveyed information is converted to geometric elements by the source
system in a way that preserves the exact appearance of the presented information
Note 1 to entry: Geometric elements can be lines, arcs, surfaces.
Note 2 to entry: The appearance is considered in terms of colour, shape and positioning.
Note 3 to entry: The arrangement of these geometric elements can be interpreted by a competent human by
looking at them, while the information content is no longer directly computer-accessible
EXAMPLE A simple graphic presentation of the letter 'A' is given by three straight lines. A more complex graphic
presentation could have ten straight lines and six circular arcs but would still be recognizable as an “A” to a human
familiar with the Latin alphabet. In both cases, a computer can only access the geometric definition of the individual
elements (start and end coordinates for each line), but not the fact that it is the letter “A” that is being presented.
Note 4 to entry: Graphic presentation does not require defining the font or alphabet (character encoding)
originally used in the creation of the presented data. In the way graphic presentation data are stored, there is
typically no distinction between geometric elements that are visual representations of characters, and geometric
elements that are visual representations of other constructs, such as leader lines, curves or terminator symbols.
Note 5 to entry: An indirect way of accessing the information content stored as graphic presentation is the
application of character recognition software that will attempt to identify the original characters from the geometric
elements that make up their visual representation. Character recognition, however, has its limitations depending
on the algorithms used, the fonts and alphabet involved, and the granularity of the graphic presentation geometry
elements. Its results cannot be used with the same level of reliability as character-based presentation.
3.1.95
graphical representation of models
representation that defines model structure, components and connections using a prescribed set of
graphical symbols which comprise a graphical modelling language, with the intent that the language
provides a complete and unambiguous definition of a particular model and its properties
Note 1 to entry: Graphical symbols often incorporate textual elements in the form of annotations or descriptions
of internal properties.
Note 2 to entry: Graphical modelling languages generally provide a method for extending the graphical
representation to define user-specific constructs.
3.1.96
hand layup
manual process of applying fabric (usually prepreg) to a layup tool
3.1.97
honeycomb core
lightweight cellular structure formed into nested cells (usually hexagonal, like a beehive) that is used in
composite sandwich constructions
3.1.98
hyper text mark-up language
HTML
mark-up language, used to indicate display parameters within a file that can be processed by a Web
browser
3.1.99
icam definition for function modelling
IDEF0
modelling methodology for describing activities and the relations between them
3.1.100
implicit composite ply representation
representation where each ply element is not explicitly defined in terms of the space it exists in but can
be defined by the contour and the tooling surface
Note 1 to entry: An explicit ply element may be constructed by using the implicit representation of the ply and
certain parameters (e.g. thickness), and the composite mechanism used to produce it.
3.1.101
inclusion
discontinuity in a composite part usually composed of encapsulated foreign material
3.1.102
information
data which is assigned by a meaning or context
EXAMPLES Facts, concepts, or instructions.
3.1.103
ingest
process of transferring data to the archive, during which the data producer submits the submission
information package from the data preparation environment into the archiving environment
3.1.104
inner mould line
IML
derived surface generated by the last ply defined in a laminate stack-up
3.1.105
inner skin assembly
ISA
derived surface generated by the combination of the last plies defined in a co-cured “skin” assembly type
design
Note 1 to entry: Equivalent to the inner skin surface (ISS) plus the IMLs of parts defined and co-cured on the ISS.
3.1.106
inner skin surface
ISS
derived surface generated by the last ply in a “skin” part type definition
3.1.107
insert
separate part made of metal or plastic that is inserted into a composite part, typically where point loads
are to be introduced into a sandwich panel
3.1.108
interlaminar
related to the interface surface between the plies
3.1.109
isotropic
materials that have uniform mechanical properties in all directions
3.1.110
item
see “product, part, item and article”
3.1.111
joint aviation requirements
JAR
prefix for standards and related documents produced by the Joint Aviation Authorities
3.1.112
key characteristic
feature of a material or part whose variation has a significant influence on product fit, performance,
service life or manufacturability
[SOURCE: NAS 9100, which in turn is based on ISO 9001]
3.1.113
Knowledge
processed, combined and stored information, whether by a machine or a human
3.1.114
lamina
single ply of composite material
3.1.115
laminate
product made by bonding together two or more plies, or more specifically a composite system made up
of layers/plies of fibre reinforcement in a resin without intermediate inserts (like core)
3.1.116
laminate coordinate axe
see “rosette”
3.1.118
laser projection
visualisation of plies and related information based on traces projected from lasers onto a layup tool
3.1.119
layup
stack of plies prior to cure
3.1.120
legal admissibility
rules under which information can be used in support of a legal case
[SOURCE: Code of Practice for Legal Admissibility]
3.1.121
limited length or area indicator
LLAI
one or more grouped geometric elements and associated PMI to define a specific region of a part with
unique characteristics or requirements
3.1.122
logical architecture model
physical implementation and arrangement of elements, interfaces, and constraints that satisfy the
verified functional architecture
EXAMPLES Components, transport elements, networks, signal definitions, and software allocations.
3.1.123
long-term
LT
long enough for information to be affected by changing technologies, including support for new media
and data formats, or a changed user community
3.1.124
long-term archiving
LTA
storage of a copy of data in an appropriate way for record, certification and legal purposes
Note 1 to entry: The data will be preserved and kept available for a use within the archive and possibly for further
re-use.
Note 2 to entry: With certified conversion processes, the native data representation generated by the source
system can be converted into a representation which is appropriate for long-term archiving. To fulfil legal and
certification requirements, the stored form can be an accurate or approximate representation of the source.
Note 3 to entry: Integrity shall be ensured by a digital signature.
Note 4 to entry: The data are retained over the long term.
Note 5 to entry: Invariance is mandatory.
Note 6 to entry: Business, legal and certification requirements are covered.
[SOURCE: EN 9300-003 – Notes to entry added]
3.1.125
long-term archiving and retrieval
LOTAR
generic name for this standard. Also: the name of the project/project team that generated this standard
3.1.126
manufacturer
company that makes physical products
Note 1 to entry: This term is also used to refer to companies that create designs, usually on behalf of the
manufacturer. This is more properly called the manufacturing definition supply chain.
3.1.127
manufacturing edge of part
MEOP
supplemental geometry represented in the dataset that defines the manufacturing periphery of the part
which is usually outside the EEOP
Note 1 to entry: The MEOP may include material to account for tooling tabs or handling lugs, or material excess for
producibility of the part, and allows material to be trimmed back to the engineering edge of part (EEOP) prior to or
on assembly.
Note 2 to entry: See “EOP”.
Note 3 to entry: See comments on EEOP.
3.1.128
matrix content
percentage of matrix found in a composite by volume or weight
3.1.129
media
physical material on which data is recorded, such as an optical disc
3.1.130
metadata
data that provides information about other data by giving context
Note 1 to entry: In the understanding of the LOTAR standards, it is the data required for the management and use
of information packages for example.
Note 2 to entry: Many distinct types of metadata exist.
[SOURCE: ISO/IEC 11179-1:2023, 3.2.16]
3.1.131
minimum length tow
distance between where the pressure is applied and the tows are cut is the minimum length of tow that
can be laid and is the limiting factor when trying to match ply boundaries with sharp corners, requiring
additional or extra material to assure total coverage
Note 1 to entry: Fibre placement machines typically have a head design that heats and applies pressure to the
tows that are being placed and includes a set of rollers and knives.
3.1.132
model-based definition
MBD
set of concepts, processes, and tools that allow the creation of an annotated 3D product definition based
on a 3D geometric representation, and includes all engineering intent requirements (including process
specifications, PMI, GD&T, and other required information)
Note 1 to entry: The MBD data set defines complete requirements for a product in its nominal condition as well
as permissible limits of variation and other acceptance criteria, providing all the data needed to plan, fabricate, and
validate an article of product hardware.
Note 2 to entry: Combined with PLM attributes, a parts list, and general notes, this constitutes an authoritative,
single source of master product definition data that does not include or depend upon traditional 2D drawings.
3.1.133
model-based design
MBD
use of mathematical, numerical and visual methods to evaluate and define behaviours, controls,
performance, signal processing, and embedded software
3.1.134
model-based systems engineering
MBSE
formalized application of modelling to support system requirements, design, analysis, verification and
validation activities beginning in the conceptual design phase and continuing throughout the
development and later lifecycle stages
[SOURCE: INCOSE SE Vision 2020 INCOSE-TP-2004-004-02, Sep. 2007]
3.1.135
model
representation of selected aspects of a domain of interest to the modeller: physical, mathematical, or
otherwise logical representation of a system, entity, phenomenon, or process
3.1.136
native format
format in which a software application stores its data, where that format is part of the design of the
software
3.1.137
nesting
process of locating the flat patterns produced from plies next to each other on rolls of “broad goods”,
(fibre woven to form fabric up to 1 270 mm), in order to minimize scrap and optimize production rates
Note 1 to entry: Once they are cut from the roll, they are usually knitted or grouped together for manufacturing
consumption.
3.1.138
nondestructive inspection
NDI
measuring the condition of a composite part without damaging/degrading the laminate or other
components
3.1.139
noodle
see “radius filler”
3.1.140
OAIS reference model
open archival information system reference model realised according to ISO 14721
Note 1 to entry: See normative references.
3.1.141
open data standard
open standard defining the syntax, semantics and pragmatics of a data model
Note 1 to entry: See “open standard”.
3.1.142
open standard
standard that fulfils the following criteria:
— described precisely in a way that is widely and freely available and does not use proprietary methods
or practices (e.g. object modelling methods using UML or EXPRESS) and includes defined semantics;
— format and services implementing the data are explicitly described (e.g. STEP Part 21 or XML, PLM
services, binary/text formats) and documentation of the format and services is rea
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