ISO 7001:2023
(Main)Graphical symbols — Registered public information symbols
Graphical symbols — Registered public information symbols
This document specifies graphical symbols for the purposes of public information. This document is generally applicable to public information symbols in all locations and all sectors where the public has access. However, it is not applicable to safety signs or those sectors subject to specific regulations (e.g. traffic signs on public roads). This document specifies the original symbols that can be scaled for reproduction and application purposes. The symbols can be used in conjunction with text to improve comprehension.
Symboles graphiques — Symboles destinés à l'information du public enregistrés
Grafični simboli - Registrirani simboli za javno informiranje
General Information
Relations
Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ISO 7001:2023
01-september-2023
Nadomešča:
SIST ISO 7001:2008
Grafični simboli - Registrirani simboli za javno informiranje
Graphical symbols - Registered public information symbols
Symboles graphiques - Symboles destinés à l'information du public enregistrés
Ta slovenski standard je istoveten z: ISO 7001:2023
ICS:
01.080.10 Simboli za javno obveščanje. Public information symbols.
Znaki. Table. Označbe Signs. Plates. Labels
SIST ISO 7001:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 7001:2023
---------------------- Page: 2 ----------------------
SIST ISO 7001:2023
INTERNATIONAL ISO
STANDARD 7001
Fourth edition
2023-02
Graphical symbols — Registered
public information symbols
Symboles graphiques — Symboles destinés à l'information du public
enregistrés
Reference number
ISO 7001:2023(E)
© ISO 2023
---------------------- Page: 3 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2023 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 2
4.1 Size . 2
4.2 Text . . 2
4.3 Arrows . 2
4.4 Colour and contrast . 3
4.5 Negation. 3
5 Meanings and categorization of public information symbols . 5
5.1 General . 5
5.2 Meaning . 5
5.3 Categorization . 5
6 Standardized public information symbols .23
Bibliography .114
iii
© ISO 2023 – All rights reserved
---------------------- Page: 5 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 145, Graphical symbols, Subcommittee
SC 1, Public information symbols.
This fourth edition cancels and replaces the third edition (ISO 7001:2007), which has been technically
revised. It also incorporates the amendments ISO 7001:2007/Amd 1:2013, ISO 7001:2007/Amd 2:2015,
ISO 7001:2007/Amd 3:2016, ISO 7001:2007/Amd 4:2017 and ISO 7001:2007/DAmd 5:2021 and the
Technical Corrigendum ISO 7001:2007/Amd 1:2013/Cor. 1:2014.
The main changes are as follows:
— addition of previously unpublished public information symbols (PI CF 021, PI CF 022, PI PF 077, PI
PF 078, PI PF 079, PI PF 080, PI PF 081, PI PF 082 and PI TF 044);
— addition of a new category of public information symbols, Accessibility, with the code PI AC and the
transfer of public information symbols from other categories to this category with new reference
numbers.
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.
All public information symbols are available on the ISO Online browsing platform
at https://www.iso.org/obp/ui.
iv
© ISO 2023 – All rights reserved
---------------------- Page: 6 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
Introduction
This document has been developed as a result of the increasing use of non-verbal presentation of
information in buildings and other places and for services used by the public. Graphical symbols should
be used where text messages will possibly be a barrier to understanding.
Continued growth in international trade, travel and tourism requires a common method of
communication, and standardization of public information symbols will help both providers and users,
including those with disabilities. Lack of standardization has the potential to lead to confusion.
The use of standardized public information symbols does not replace the need for careful consideration
and application of wayfinding and signing schemes; it is recognized that pubic information symbols will
often be used with text in signing systems. This can aid education and comprehension, particularly for
new symbols and those which have less common usage.
ISO 7001 is intended to be used by all Technical Committees within ISO charged with developing specific
public information symbols for their industry, to ensure that there is only one symbol for each meaning. It
is also intended that this document be revised regularly to include public information symbols as they are
standardized by ISO and which conform to the principles for development as developed by ISO/TC 145/SC 1.
Further design criteria will be added as appropriate and will be approved by ISO/TC 145/SC 1. Specific
acceptance criteria, procedures and application forms can be found on the ISO/TC 145/SC 1 website:
https://isotc.iso.org/livelink/livelink?func=ll&objId=9945810&objAction=browse&viewType=1.
The public information symbols in this document have been validated by ISO/TC 145/SC 1 according
to procedures of standardization current at the time of publication. Future standardization of public
information symbols will be facilitated with suitable evaluation techniques, such as the testing outlined
in the ISO 9186 series. Acceptance criteria for public information symbol qualification ought to be such
that there is confidence that a suitable proportion of the intended audience will understand them.
Public information symbols given in this document are considered to have achieved a satisfactory
degree of comprehension as established by independent testing or as a result of their use and application
at an international level.
The public information symbols given in this document should be reproduced as published. However,
it is recognized that there are possibly particular national characteristics and cultural requirements
which require minor variations. This is acceptable providing the key elements and design intent of the
standardized symbol are not compromised.
v
© ISO 2023 – All rights reserved
---------------------- Page: 7 ----------------------
SIST ISO 7001:2023
---------------------- Page: 8 ----------------------
SIST ISO 7001:2023
INTERNATIONAL STANDARD ISO 7001:2023(E)
Graphical symbols — Registered public information
symbols
1 Scope
This document specifies graphical symbols for the purposes of public information.
This document is generally applicable to public information symbols in all locations and all sectors
where the public has access. However, it is not applicable to safety signs or those sectors subject to
specific regulations (e.g. traffic signs on public roads).
This document specifies the original symbols that can be scaled for reproduction and application
purposes.
The symbols can be used in conjunction with text to improve comprehension.
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.
ISO 3864-1, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety
signs and safety markings
ISO 22727:2007, Graphical symbols — Creation and design of public information symbols — Requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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/
3.1
graphical symbol
visually perceptible figure with a particular meaning used to transmit information independently of
language
3.2
public information symbol
graphical symbol intended to give information to the general public, the understanding of which is
independent of specialist or occupational training
3.3
safety sign
sign giving a general safety message, obtained by a combination of a colour and geometric shape and
which, by the addition of a graphical symbol, gives a particular safety message
3.4
negation
indication of the absence or opposite of something actual or positive
1
© ISO 2023 – All rights reserved
---------------------- Page: 9 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
3.5
meaning
message that a public information symbol is intended to convey
3.6
function
written description of the purpose of the information to be conveyed by a graphical symbol
3.7
image content
written description of the elements of a graphical symbol or safety sign and their relative disposition
4 General
4.1 Size
The public information symbols given in this document are designed to be reproduced in a variety
of sizes to suit different applications from, for example, small-scale orientation notices to large-scale
wayfinding signs, maps and guides.
4.2 Text
The graphical symbols have been designed with the intention that they can be used on their own to
convey the information described in the meaning (except the direction arrow, which cannot be used
on its own, see 4.3). However, they may be combined with the relevant text on, for example, a sign or
notice if considered appropriate. This can be an advantage with less well-established symbols to aid
understanding.
4.3 Arrows
The direction arrow (symbol number PI PF 030) shall only be used in conjunction with another symbol
(or a symbol and text) to indicate movement of a person towards something. An example is shown in
Figure 1.
Figure 1 — Use of the direction arrow with the relevant symbol to indicate female toilet to the
right
2
© ISO 2023 – All rights reserved
---------------------- Page: 10 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
The direction arrow shall be used to indicate the direction of a person as shown in Figure 2.
Progress to the right
Progress to the left
Progress forward from here
Progress forward and through from here
Progress forward and up from here
Progress up to the right
Progress forward and across to the right
Progress down to the right
Progress up to the left
Progress forward and across to the left
Progress down to the left
Progress down from here
Figure 2 — Use of direction arrows
The use of all other arrows is given with the relevant graphical symbol and meaning.
4.4 Colour and contrast
The public information symbols given in this document may be reproduced in any colour. However, the
combination of safety colours and shapes specified in ISO 3864-1 shall be avoided to ensure there is no
confusion between public information symbols and safety signs. This also applies to arrows where the
use of green and white shall be avoided to ensure that there is no confusion with the direction arrow,
safe condition, used for evacuation routes.
Adequate contrast between the symbol and its background is essential and the symbol should be given
a sufficiently large surrounding area to ensure identifiability. All illustrations of graphical symbols in
this document have corner marks to give an indication of the minimum area required.
4.5 Negation
Public information symbols shall be negated only for comfort or convenience reasons.
Where the whole activity is to be negated, the negation element shall be a diagonal bar running from top
left to bottom right as shown in Figure 3. In order to ensure that there is no confusion with safety signs,
there shall not be a surrounding circle. The negation bar shall be placed over the graphical symbol.
The graphical symbol shall be designed in such a way that when placed in the template specified in
ISO 22727:2007, 7.2 the negation bar does not obscure critical details.
Where only a graphical symbol element in a public information symbol is to be negated to indicate a
particular forbidden action, the negation element shall be a cross as shown in Figure 4. The negation
cross shall be placed over the graphical symbol element which is being negated.
3
© ISO 2023 – All rights reserved
---------------------- Page: 11 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
The negation bar and the negation cross should normally be red.
Meaning: No baggage trolleys or carts.
Function: To signify that baggage trolleys or carts are not allowed.
Image content: Side view of piece of baggage on trolley or cart and negation bar.
Figure 3 — Example of the use of a negation bar
Meaning: Do not drop trash or litter or rubbish.
Function: To indicate that people should not drop trash or litter or rubbish.
Image content: Front view of human figure, with four representative articles of trash or litter or rubbish
falling from their hand and a negation cross over them.
Figure 4 — Example of the use of a negation cross
4
© ISO 2023 – All rights reserved
---------------------- Page: 12 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
5 Meanings and categorization of public information symbols
5.1 General
This document is maintained electronically using the ISO OBP database at https:// www .iso .org/ obp/
ui, which includes all the symbols. The reference number for each symbol is indexed in the database to
enable easy searching. Text searches are also possible.
Tables 1 and 2, which include a reference number with each standardized public information symbol,
may be used to facilitate searches within this database.
5.2 Meaning
Table 1 presents the list of meanings in alphabetical order alongside their reference numbers.
5.3 Categorization
For the convenience of users of this document, the public information symbols have been grouped
according to the areas where they are normally expected to be used. However, these groupings are
not intended to be exclusive and the use of the public information symbols in other areas, where this is
considered appropriate, is not precluded. The public information symbols are categorized as follows:
a) PF: public facilities.
b) TF: transport facilities.
c) TC: tourism, culture and heritage.
d) SA: sporting activities.
e) CF: commercial facilities.
f) BP: behaviour of the public (excluding public safety signs).
g) AC: accessibility.
Table 2 summarizes the standardized public information symbols in terms of these categorizations.
Each public information symbol should normally be used to convey only one public information message
and should normally be placed in one category only.
Table 1 — Summary of meanings in alphabetical order
Meaning Reference number
Accessible elevator or lift PI AC 003
Accessible toilet or full accessibility PI AC 001
Accommodation or hotel PI CF 003
Airport bus PI TF 027
Airport or aircraft PI TF 001
Animal transportation PI TF 038
Arrow – direction arrow PI PF 030
Assistance dog – accessibility PI AC 005
ATM (automatic teller machine) or cash service or cash dispenser PI CF 005
Audio tour PI TC 014
Baby care or nursery PI PF 023
Baggage assist PI PF 069
5
© ISO 2023 – All rights reserved
---------------------- Page: 13 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Baggage check or customs PI TF 018
Baggage delivery PI PF 068
Baggage lockers or coin lockers PI PF 013
Baggage reclaim PI TF 020
Baggage storage or left baggage PI PF 012
Baggage trolleys or carts PI PF 018
Baggage weighing PI TF 030
Bar PI CF 008
Barber or hair salon PI CF 015
Bath PI PF 026
Beach PI TC 017
Bicycle or cycle facility PI TF 010
Bicycle or cycle parking PI TF 021
Biometric facial-recognition facility PI BP 009
Blind or low vision – accessibility PI AC 009
Bicycle – rental PI TF 029
Bird sanctuary PI TC 011
Boats or port or ships or ferries PI TF 004
Buffet or coffee shop or café – refreshments PI CF 002
Bureau de change or money or currency exchange PI CF 004
Bus disembarkation PI TF 039
Bus embarkation PI TF 040
Bus station or bus stop or buses PI TF 006
Cable car PI TF 011
Cable railway or funicular PI TF 012
Café or coffee shop or buffet – refreshments PI CF 002
Camper van – self-contained PI TF 036
Campfires – location PI TC 010
Campsite or camping PI TC 002
Caravan park or caravans PI TC 003
Car parking or parking PI TF 014
Car rental or hire or rent-a-car PI TF 009
Car repair workshop PI CF 017
Carts or baggage trolleys PI PF 018
Cash service or cash dispenser or ATM (automatic teller machine) PI CF 005
Chair lift PI TF 013
Check-in or reception PI PF 008
Changing room – men's PI PF 079
Changing room – women's PI PF 081
Cinema PI CF 016
Cloakroom PI PF 024
Coffee shop or café or buffet – refreshments PI CF 002
Coin lockers or baggage lockers PI PF 013
Communication in the specified language PI PF 062
6
© ISO 2023 – All rights reserved
---------------------- Page: 14 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Conference facilities or meeting room PI CF 010
Currency or money exchange or bureau de change PI CF 004
Customs or baggage check PI TF 018
Cycle or bicycle facility PI TF 010
Cycle or bicycle parking PI TF 021
Dance hall or ballroom PI CF 021
Dentist PI PF 043
Direction arrow PI PF 030
Doctor or healthcare centre PI PF 044
Dog assistance – accessibility PI AC 005
Dogs should be carried PI BP 006
Drinking water PI PF 007
Drinking water fountain PI PF 077
Electric vehicle charging station or point PI TF 044
Elevator for goods PI PF 078
Elevator or lift PI PF 019
Elevator or lift accessible PI AC 003
Embassy PI PF 070
Entrance or way in PI PF 028
Escalator PI PF 020
Escalator, down PI PF 033
Escalator, up PI PF 034
Exit or way out PI PF 029
Faucet or tap – automatic sensor PI PF 074
Female toilets PI PF 005
Ferries or port or ships or boats PI TF 004
Filling station PI CF 009
Flight arrivals PI TF 016
Flight connections PI TF 017
Flight departures PI TF 015
Foot care or podiatry PI CF 012
Full accessibility or toilets – accessible PI AC 001
Funicular or cable railway PI TF 012
General sports or sporting activities PI SA 001
Hair salon or barber PI CF 015
Hand dryer PI PF 075
Hard of hearing – accessibility PI AC 007
Headwear – no headwear PI BP 015
Healthcare centre – child PI PF 036
Healthcare centre or doctor PI PF 044
Hearing impaired loop – accessibility PI AC 015
Heliport or helicopters PI TF 005
Hiking trail PI TC 009
Hospital PI PF 002
7
© ISO 2023 – All rights reserved
---------------------- Page: 15 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Hot spring or hot tub PI TC 013
Hotel or accommodation PI CF 003
Immigration or passport control or inspection PI TF 019
Information PI PF 001
Internet café PI CF 011
Laundry service PI CF 022
Left baggage or baggage storage PI PF 012
Library PI PF 037
Lift or elevator PI PF 019
Lift or elevator accessible PI AC 003
Limited walking capability – accessibility PI AC 004
Line up or queue in single file PI BP 003
Line up or queue in threes PI BP 005
Line up or queue in twos PI BP 004
Litter bin or trash box or rubbish bin PI PF 027
Lockers – baggage lockers or coin lockers PI PF 013
Look to a point PI BP 010
Loop for hearing impaired – accessibility PI AC 015
Lost and found or lost property PI PF 009
Lounge or waiting area PI PF 014
Low vision or blind – accessibility PI AC 009
Mail box or post or post office PI PF 016
Male toilets PI PF 004
Meeting point PI TF 042
Meeting point – tour group PI TF 043
Meeting room or conference facilities PI CF 010
Men’s changing room PI PF 079
Metro or underground railway station or trains PI TF 003
Money or currency exchange or bureau de change PI CF 004
Move hair PI BP 012
Moving walkway PI PF 032
Museum PI PF 054
Natural area with public access PI TC 008
Newsstand or news kiosk or newsagent PI CF 014
Nursery or baby care PI PF 023
Packed-lunch room PI TC 016
Panorama or viewpoint PI TC 001
Park – recreational PI TC 006
Parking or car parking PI TF 014
Parking – bicycle or cycle parking PI TF 021
Passport – open passport and place on scanning device PI BP 013
Passport control or inspection or immigration PI TF 019
Passport control – manual PI BP 011
Pedestrian overpass or footbridge PI PF 080
8
© ISO 2023 – All rights reserved
---------------------- Page: 16 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Pedestrian underpass PI PF 067
Personal assistant available – accessibility PI AC 006
Pharmacy PI CF 007
Picnic area PI TC 004
Planetarium PI TC 018
Play area PI TC 005
Play area – indoor PI TC 015
Podiatry or foot care PI CF 012
Port or ships or ferries or boats PI TF 004
Post or post office or mail box PI PF 016
Priority access for elderly people – accessibility PI AC 010
Priority access for injured people – accessibility PI AC 011
Priority access for people with internal medical conditions – accessibility PI AC 012
Priority access for people with small children – accessibility PI AC 013
Priority access for expecting mothers – accessibility PI AC 014
Priority facilities for obese people – accessibility PI AC 016
Priority seats for elderly people – accessibility PI AC 017
Priority seats for injured people – accessibility PI AC 018
Priority seats for people with internal medical conditions – accessibility PI AC 019
Priority seats for people with small children – accessibility PI AC 020
Priority seats for expecting mothers – accessibility PI AC 021
Priority seats for obese people – accessibility PI AC 022
Proceed forward PI BP 019
Quarantine PI TF 031
Quarantine, animal PI TF 032
Quarantine, people PI TF 033
Quarantine, plant PI TF 034
Quiet please or silence PI BP 001
Queue or line up in single file PI BP 003
Queue or line up in threes PI BP 005
Queue or line up in twos PI BP 004
Railway – funicular or cable railway PI TF 012
Railway – underground or metro station or trains PI TF 003
Railway station or railways or trains PI TF 002
Ramped access or slope – accessibility PI AC 002
Reception or check-in PI PF 008
Recycling PI PF 066
Recycling – cans PI PF 063
Recycling – magnetic type of steel PI PF 064
Recycling – glass PI PF 065
Recycling – plastics PI PF 082
Refreshments – coffee shop or café or buffet PI CF 002
Rent-a-car or car rental or hire PI TF 009
Rental bicycle PI TF 029
9
© ISO 2023 – All rights reserved
---------------------- Page: 17 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Restaurant PI CF 001
Rubbish bin or trash box or litter bin PI PF 027
Security check PI TF 037
Ships or port or ferries or boats PI TF 004
Shoes – take off your shoes PI BP 007
Shoeshine PI CF 019
Shops or shopping PI CF 006
Shower PI PF 025
Silence or quiet please PI BP 001
Single person PI BP 018
Slope or ramped access – accessibility PI AC 002
Smile – do not smile PI BP 014
Smoking area or smoking allowed PI PF 015
Snack machine PI CF 020
Sports hall PI SA 004
Sporting activities or general sports PI SA 001
Stadium PI SA 002
Stairs PI PF 021
Stand on the left (or right) PI BP 002
Station – underground or metro PI TF 003
Station – railway or trains PI TF 002
Streetcar or tram stop or streetcars or trams PI TF 007
Sunglasses – no sunglasses PI BP 017
Surveillance camera PI BP 008
Swimming pool – indoor PI SA 003
Tap or faucet – automatic sensor PI PF 074
Taxi stop or taxis PI TF 008
Telephone PI PF 017
Tickets or ticket sales PI PF 010
Ticket validation PI PF 011
Toilets – accessible PI AC 001
Toilets – female PI PF 005
Toilets – male PI PF 004
Toilets – unisex PI PF 003
Toilet paper PI PF 076
Trains or railway station or railways PI TF 002
Trains – underground or metro PI TF 003
Tram or streetcar stop or trams or streetcars PI TF 007
Transportation centre PI TF 028
Trash box or litter bin or rubbish bin PI PF 027
Trolleys – baggage trolleys or carts PI PF 018
Underground or metro railway station or trains PI TF 003
Underpass – pedestrian PI PF 067
Unisex toilets PI PF 003
10
© ISO 2023 – All rights reserved
---------------------- Page: 18 ----------------------
SIST ISO 7001:2023
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Vegetarian food PI PF 050
Viewpoint or panorama PI TC 001
Vision impaired – accessibility PI AC 008
Wait PI BP 016
Waiting area or lounge PI PF 014
...
INTERNATIONAL ISO
STANDARD 7001
Fourth edition
2023-02
Graphical symbols — Registered
public information symbols
Symboles graphiques — Symboles destinés à l'information du public
enregistrés
Reference number
ISO 7001:2023(E)
© ISO 2023
---------------------- Page: 1 ----------------------
ISO 7001:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 7001:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 2
4.1 Size . 2
4.2 Text . . 2
4.3 Arrows . 2
4.4 Colour and contrast . 3
4.5 Negation. 3
5 Meanings and categorization of public information symbols . 5
5.1 General . 5
5.2 Meaning . 5
5.3 Categorization . 5
6 Standardized public information symbols .23
Bibliography .114
iii
© ISO 2023 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 7001:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 145, Graphical symbols, Subcommittee
SC 1, Public information symbols.
This fourth edition cancels and replaces the third edition (ISO 7001:2007), which has been technically
revised. It also incorporates the amendments ISO 7001:2007/Amd 1:2013, ISO 7001:2007/Amd 2:2015,
ISO 7001:2007/Amd 3:2016, ISO 7001:2007/Amd 4:2017 and ISO 7001:2007/DAmd 5:2021 and the
Technical Corrigendum ISO 7001:2007/Amd 1:2013/Cor. 1:2014.
The main changes are as follows:
— addition of previously unpublished public information symbols (PI CF 021, PI CF 022, PI PF 077, PI
PF 078, PI PF 079, PI PF 080, PI PF 081, PI PF 082 and PI TF 044);
— addition of a new category of public information symbols, Accessibility, with the code PI AC and the
transfer of public information symbols from other categories to this category with new reference
numbers.
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.
All public information symbols are available on the ISO Online browsing platform
at https://www.iso.org/obp/ui.
iv
© ISO 2023 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 7001:2023(E)
Introduction
This document has been developed as a result of the increasing use of non-verbal presentation of
information in buildings and other places and for services used by the public. Graphical symbols should
be used where text messages will possibly be a barrier to understanding.
Continued growth in international trade, travel and tourism requires a common method of
communication, and standardization of public information symbols will help both providers and users,
including those with disabilities. Lack of standardization has the potential to lead to confusion.
The use of standardized public information symbols does not replace the need for careful consideration
and application of wayfinding and signing schemes; it is recognized that pubic information symbols will
often be used with text in signing systems. This can aid education and comprehension, particularly for
new symbols and those which have less common usage.
ISO 7001 is intended to be used by all Technical Committees within ISO charged with developing specific
public information symbols for their industry, to ensure that there is only one symbol for each meaning. It
is also intended that this document be revised regularly to include public information symbols as they are
standardized by ISO and which conform to the principles for development as developed by ISO/TC 145/SC 1.
Further design criteria will be added as appropriate and will be approved by ISO/TC 145/SC 1. Specific
acceptance criteria, procedures and application forms can be found on the ISO/TC 145/SC 1 website:
https://isotc.iso.org/livelink/livelink?func=ll&objId=9945810&objAction=browse&viewType=1.
The public information symbols in this document have been validated by ISO/TC 145/SC 1 according
to procedures of standardization current at the time of publication. Future standardization of public
information symbols will be facilitated with suitable evaluation techniques, such as the testing outlined
in the ISO 9186 series. Acceptance criteria for public information symbol qualification ought to be such
that there is confidence that a suitable proportion of the intended audience will understand them.
Public information symbols given in this document are considered to have achieved a satisfactory
degree of comprehension as established by independent testing or as a result of their use and application
at an international level.
The public information symbols given in this document should be reproduced as published. However,
it is recognized that there are possibly particular national characteristics and cultural requirements
which require minor variations. This is acceptable providing the key elements and design intent of the
standardized symbol are not compromised.
v
© ISO 2023 – All rights reserved
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 7001:2023(E)
Graphical symbols — Registered public information
symbols
1 Scope
This document specifies graphical symbols for the purposes of public information.
This document is generally applicable to public information symbols in all locations and all sectors
where the public has access. However, it is not applicable to safety signs or those sectors subject to
specific regulations (e.g. traffic signs on public roads).
This document specifies the original symbols that can be scaled for reproduction and application
purposes.
The symbols can be used in conjunction with text to improve comprehension.
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.
ISO 3864-1, Graphical symbols — Safety colours and safety signs — Part 1: Design principles for safety
signs and safety markings
ISO 22727:2007, Graphical symbols — Creation and design of public information symbols — Requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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/
3.1
graphical symbol
visually perceptible figure with a particular meaning used to transmit information independently of
language
3.2
public information symbol
graphical symbol intended to give information to the general public, the understanding of which is
independent of specialist or occupational training
3.3
safety sign
sign giving a general safety message, obtained by a combination of a colour and geometric shape and
which, by the addition of a graphical symbol, gives a particular safety message
3.4
negation
indication of the absence or opposite of something actual or positive
1
© ISO 2023 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 7001:2023(E)
3.5
meaning
message that a public information symbol is intended to convey
3.6
function
written description of the purpose of the information to be conveyed by a graphical symbol
3.7
image content
written description of the elements of a graphical symbol or safety sign and their relative disposition
4 General
4.1 Size
The public information symbols given in this document are designed to be reproduced in a variety
of sizes to suit different applications from, for example, small-scale orientation notices to large-scale
wayfinding signs, maps and guides.
4.2 Text
The graphical symbols have been designed with the intention that they can be used on their own to
convey the information described in the meaning (except the direction arrow, which cannot be used
on its own, see 4.3). However, they may be combined with the relevant text on, for example, a sign or
notice if considered appropriate. This can be an advantage with less well-established symbols to aid
understanding.
4.3 Arrows
The direction arrow (symbol number PI PF 030) shall only be used in conjunction with another symbol
(or a symbol and text) to indicate movement of a person towards something. An example is shown in
Figure 1.
Figure 1 — Use of the direction arrow with the relevant symbol to indicate female toilet to the
right
2
© ISO 2023 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 7001:2023(E)
The direction arrow shall be used to indicate the direction of a person as shown in Figure 2.
Progress to the right
Progress to the left
Progress forward from here
Progress forward and through from here
Progress forward and up from here
Progress up to the right
Progress forward and across to the right
Progress down to the right
Progress up to the left
Progress forward and across to the left
Progress down to the left
Progress down from here
Figure 2 — Use of direction arrows
The use of all other arrows is given with the relevant graphical symbol and meaning.
4.4 Colour and contrast
The public information symbols given in this document may be reproduced in any colour. However, the
combination of safety colours and shapes specified in ISO 3864-1 shall be avoided to ensure there is no
confusion between public information symbols and safety signs. This also applies to arrows where the
use of green and white shall be avoided to ensure that there is no confusion with the direction arrow,
safe condition, used for evacuation routes.
Adequate contrast between the symbol and its background is essential and the symbol should be given
a sufficiently large surrounding area to ensure identifiability. All illustrations of graphical symbols in
this document have corner marks to give an indication of the minimum area required.
4.5 Negation
Public information symbols shall be negated only for comfort or convenience reasons.
Where the whole activity is to be negated, the negation element shall be a diagonal bar running from top
left to bottom right as shown in Figure 3. In order to ensure that there is no confusion with safety signs,
there shall not be a surrounding circle. The negation bar shall be placed over the graphical symbol.
The graphical symbol shall be designed in such a way that when placed in the template specified in
ISO 22727:2007, 7.2 the negation bar does not obscure critical details.
Where only a graphical symbol element in a public information symbol is to be negated to indicate a
particular forbidden action, the negation element shall be a cross as shown in Figure 4. The negation
cross shall be placed over the graphical symbol element which is being negated.
3
© ISO 2023 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 7001:2023(E)
The negation bar and the negation cross should normally be red.
Meaning: No baggage trolleys or carts.
Function: To signify that baggage trolleys or carts are not allowed.
Image content: Side view of piece of baggage on trolley or cart and negation bar.
Figure 3 — Example of the use of a negation bar
Meaning: Do not drop trash or litter or rubbish.
Function: To indicate that people should not drop trash or litter or rubbish.
Image content: Front view of human figure, with four representative articles of trash or litter or rubbish
falling from their hand and a negation cross over them.
Figure 4 — Example of the use of a negation cross
4
© ISO 2023 – All rights reserved
---------------------- Page: 9 ----------------------
ISO 7001:2023(E)
5 Meanings and categorization of public information symbols
5.1 General
This document is maintained electronically using the ISO OBP database at https:// www .iso .org/ obp/
ui, which includes all the symbols. The reference number for each symbol is indexed in the database to
enable easy searching. Text searches are also possible.
Tables 1 and 2, which include a reference number with each standardized public information symbol,
may be used to facilitate searches within this database.
5.2 Meaning
Table 1 presents the list of meanings in alphabetical order alongside their reference numbers.
5.3 Categorization
For the convenience of users of this document, the public information symbols have been grouped
according to the areas where they are normally expected to be used. However, these groupings are
not intended to be exclusive and the use of the public information symbols in other areas, where this is
considered appropriate, is not precluded. The public information symbols are categorized as follows:
a) PF: public facilities.
b) TF: transport facilities.
c) TC: tourism, culture and heritage.
d) SA: sporting activities.
e) CF: commercial facilities.
f) BP: behaviour of the public (excluding public safety signs).
g) AC: accessibility.
Table 2 summarizes the standardized public information symbols in terms of these categorizations.
Each public information symbol should normally be used to convey only one public information message
and should normally be placed in one category only.
Table 1 — Summary of meanings in alphabetical order
Meaning Reference number
Accessible elevator or lift PI AC 003
Accessible toilet or full accessibility PI AC 001
Accommodation or hotel PI CF 003
Airport bus PI TF 027
Airport or aircraft PI TF 001
Animal transportation PI TF 038
Arrow – direction arrow PI PF 030
Assistance dog – accessibility PI AC 005
ATM (automatic teller machine) or cash service or cash dispenser PI CF 005
Audio tour PI TC 014
Baby care or nursery PI PF 023
Baggage assist PI PF 069
5
© ISO 2023 – All rights reserved
---------------------- Page: 10 ----------------------
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Baggage check or customs PI TF 018
Baggage delivery PI PF 068
Baggage lockers or coin lockers PI PF 013
Baggage reclaim PI TF 020
Baggage storage or left baggage PI PF 012
Baggage trolleys or carts PI PF 018
Baggage weighing PI TF 030
Bar PI CF 008
Barber or hair salon PI CF 015
Bath PI PF 026
Beach PI TC 017
Bicycle or cycle facility PI TF 010
Bicycle or cycle parking PI TF 021
Biometric facial-recognition facility PI BP 009
Blind or low vision – accessibility PI AC 009
Bicycle – rental PI TF 029
Bird sanctuary PI TC 011
Boats or port or ships or ferries PI TF 004
Buffet or coffee shop or café – refreshments PI CF 002
Bureau de change or money or currency exchange PI CF 004
Bus disembarkation PI TF 039
Bus embarkation PI TF 040
Bus station or bus stop or buses PI TF 006
Cable car PI TF 011
Cable railway or funicular PI TF 012
Café or coffee shop or buffet – refreshments PI CF 002
Camper van – self-contained PI TF 036
Campfires – location PI TC 010
Campsite or camping PI TC 002
Caravan park or caravans PI TC 003
Car parking or parking PI TF 014
Car rental or hire or rent-a-car PI TF 009
Car repair workshop PI CF 017
Carts or baggage trolleys PI PF 018
Cash service or cash dispenser or ATM (automatic teller machine) PI CF 005
Chair lift PI TF 013
Check-in or reception PI PF 008
Changing room – men's PI PF 079
Changing room – women's PI PF 081
Cinema PI CF 016
Cloakroom PI PF 024
Coffee shop or café or buffet – refreshments PI CF 002
Coin lockers or baggage lockers PI PF 013
Communication in the specified language PI PF 062
6
© ISO 2023 – All rights reserved
---------------------- Page: 11 ----------------------
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Conference facilities or meeting room PI CF 010
Currency or money exchange or bureau de change PI CF 004
Customs or baggage check PI TF 018
Cycle or bicycle facility PI TF 010
Cycle or bicycle parking PI TF 021
Dance hall or ballroom PI CF 021
Dentist PI PF 043
Direction arrow PI PF 030
Doctor or healthcare centre PI PF 044
Dog assistance – accessibility PI AC 005
Dogs should be carried PI BP 006
Drinking water PI PF 007
Drinking water fountain PI PF 077
Electric vehicle charging station or point PI TF 044
Elevator for goods PI PF 078
Elevator or lift PI PF 019
Elevator or lift accessible PI AC 003
Embassy PI PF 070
Entrance or way in PI PF 028
Escalator PI PF 020
Escalator, down PI PF 033
Escalator, up PI PF 034
Exit or way out PI PF 029
Faucet or tap – automatic sensor PI PF 074
Female toilets PI PF 005
Ferries or port or ships or boats PI TF 004
Filling station PI CF 009
Flight arrivals PI TF 016
Flight connections PI TF 017
Flight departures PI TF 015
Foot care or podiatry PI CF 012
Full accessibility or toilets – accessible PI AC 001
Funicular or cable railway PI TF 012
General sports or sporting activities PI SA 001
Hair salon or barber PI CF 015
Hand dryer PI PF 075
Hard of hearing – accessibility PI AC 007
Headwear – no headwear PI BP 015
Healthcare centre – child PI PF 036
Healthcare centre or doctor PI PF 044
Hearing impaired loop – accessibility PI AC 015
Heliport or helicopters PI TF 005
Hiking trail PI TC 009
Hospital PI PF 002
7
© ISO 2023 – All rights reserved
---------------------- Page: 12 ----------------------
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Hot spring or hot tub PI TC 013
Hotel or accommodation PI CF 003
Immigration or passport control or inspection PI TF 019
Information PI PF 001
Internet café PI CF 011
Laundry service PI CF 022
Left baggage or baggage storage PI PF 012
Library PI PF 037
Lift or elevator PI PF 019
Lift or elevator accessible PI AC 003
Limited walking capability – accessibility PI AC 004
Line up or queue in single file PI BP 003
Line up or queue in threes PI BP 005
Line up or queue in twos PI BP 004
Litter bin or trash box or rubbish bin PI PF 027
Lockers – baggage lockers or coin lockers PI PF 013
Look to a point PI BP 010
Loop for hearing impaired – accessibility PI AC 015
Lost and found or lost property PI PF 009
Lounge or waiting area PI PF 014
Low vision or blind – accessibility PI AC 009
Mail box or post or post office PI PF 016
Male toilets PI PF 004
Meeting point PI TF 042
Meeting point – tour group PI TF 043
Meeting room or conference facilities PI CF 010
Men’s changing room PI PF 079
Metro or underground railway station or trains PI TF 003
Money or currency exchange or bureau de change PI CF 004
Move hair PI BP 012
Moving walkway PI PF 032
Museum PI PF 054
Natural area with public access PI TC 008
Newsstand or news kiosk or newsagent PI CF 014
Nursery or baby care PI PF 023
Packed-lunch room PI TC 016
Panorama or viewpoint PI TC 001
Park – recreational PI TC 006
Parking or car parking PI TF 014
Parking – bicycle or cycle parking PI TF 021
Passport – open passport and place on scanning device PI BP 013
Passport control or inspection or immigration PI TF 019
Passport control – manual PI BP 011
Pedestrian overpass or footbridge PI PF 080
8
© ISO 2023 – All rights reserved
---------------------- Page: 13 ----------------------
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Pedestrian underpass PI PF 067
Personal assistant available – accessibility PI AC 006
Pharmacy PI CF 007
Picnic area PI TC 004
Planetarium PI TC 018
Play area PI TC 005
Play area – indoor PI TC 015
Podiatry or foot care PI CF 012
Port or ships or ferries or boats PI TF 004
Post or post office or mail box PI PF 016
Priority access for elderly people – accessibility PI AC 010
Priority access for injured people – accessibility PI AC 011
Priority access for people with internal medical conditions – accessibility PI AC 012
Priority access for people with small children – accessibility PI AC 013
Priority access for expecting mothers – accessibility PI AC 014
Priority facilities for obese people – accessibility PI AC 016
Priority seats for elderly people – accessibility PI AC 017
Priority seats for injured people – accessibility PI AC 018
Priority seats for people with internal medical conditions – accessibility PI AC 019
Priority seats for people with small children – accessibility PI AC 020
Priority seats for expecting mothers – accessibility PI AC 021
Priority seats for obese people – accessibility PI AC 022
Proceed forward PI BP 019
Quarantine PI TF 031
Quarantine, animal PI TF 032
Quarantine, people PI TF 033
Quarantine, plant PI TF 034
Quiet please or silence PI BP 001
Queue or line up in single file PI BP 003
Queue or line up in threes PI BP 005
Queue or line up in twos PI BP 004
Railway – funicular or cable railway PI TF 012
Railway – underground or metro station or trains PI TF 003
Railway station or railways or trains PI TF 002
Ramped access or slope – accessibility PI AC 002
Reception or check-in PI PF 008
Recycling PI PF 066
Recycling – cans PI PF 063
Recycling – magnetic type of steel PI PF 064
Recycling – glass PI PF 065
Recycling – plastics PI PF 082
Refreshments – coffee shop or café or buffet PI CF 002
Rent-a-car or car rental or hire PI TF 009
Rental bicycle PI TF 029
9
© ISO 2023 – All rights reserved
---------------------- Page: 14 ----------------------
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Restaurant PI CF 001
Rubbish bin or trash box or litter bin PI PF 027
Security check PI TF 037
Ships or port or ferries or boats PI TF 004
Shoes – take off your shoes PI BP 007
Shoeshine PI CF 019
Shops or shopping PI CF 006
Shower PI PF 025
Silence or quiet please PI BP 001
Single person PI BP 018
Slope or ramped access – accessibility PI AC 002
Smile – do not smile PI BP 014
Smoking area or smoking allowed PI PF 015
Snack machine PI CF 020
Sports hall PI SA 004
Sporting activities or general sports PI SA 001
Stadium PI SA 002
Stairs PI PF 021
Stand on the left (or right) PI BP 002
Station – underground or metro PI TF 003
Station – railway or trains PI TF 002
Streetcar or tram stop or streetcars or trams PI TF 007
Sunglasses – no sunglasses PI BP 017
Surveillance camera PI BP 008
Swimming pool – indoor PI SA 003
Tap or faucet – automatic sensor PI PF 074
Taxi stop or taxis PI TF 008
Telephone PI PF 017
Tickets or ticket sales PI PF 010
Ticket validation PI PF 011
Toilets – accessible PI AC 001
Toilets – female PI PF 005
Toilets – male PI PF 004
Toilets – unisex PI PF 003
Toilet paper PI PF 076
Trains or railway station or railways PI TF 002
Trains – underground or metro PI TF 003
Tram or streetcar stop or trams or streetcars PI TF 007
Transportation centre PI TF 028
Trash box or litter bin or rubbish bin PI PF 027
Trolleys – baggage trolleys or carts PI PF 018
Underground or metro railway station or trains PI TF 003
Underpass – pedestrian PI PF 067
Unisex toilets PI PF 003
10
© ISO 2023 – All rights reserved
---------------------- Page: 15 ----------------------
ISO 7001:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
Meaning Reference number
Vegetarian food PI PF 050
Viewpoint or panorama PI TC 001
Vision impaired – accessibility PI AC 008
Wait PI BP 016
Waiting area or lounge PI PF 014
Water – drinking water PI PF 007
Water taxi PI TF 035
Way in or entrance PI PF 028
Way out or exit PI PF 029
Wetland reserve PI TC 012
Wireless LAN PI CF 018
Women’s changing room PI PF 081
Zoo PI TC 007
Table 2 — Summary of all public information symbols
Category
PF TF TC SA CF BP AC
Public Transport Tourism, Sporting Commercial Behaviour of Accessibility
facilities facilities culture and activities facilities the public
heritage
Symbol
Reference PI AC 001
PI PF 001 PI TF 001 PI TC 001 PI SA 001 PI CF 001 PI BP 001
number
Accessibility
Sporting
Airport or Viewpoint Quiet please – Full
Meaning Information activities or Restaurant
aircraft or panorama or silence accessibility or
general sports
toilets access
Symbol
Reference PI AC 002
PI PF 002 PI TF 002 PI TC 002 PI SA 002 PI CF 002 PI BP 002
number
Railway station Refreshments – Accessibility –
Campsite Stand on the left
Meaning Hospital or railways Stadium coffee shop or slope or ramped
or camping (or right)
or trains café or buffet access
Symbol
Reference PI AC 003
PI PF 003 PI TF 003 PI TC 003 PI SA 003 PI CF 003 PI
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.