UTS #52: Unicode Emoji Mechanisms
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Unicode/IDN Security Mark Davis President, Unicode Consortium Chief SW Globalization Arch., IBM the Unicode Consortium
Unicode/IDN Security Mark Davis President, Unicode Consortium Chief SW Globalization Arch., IBM The Unicode Consortium Software globalization standards: define properties and behavior for every character in every script Unicode Standard: a unique code for every character Common Locale Data Repository: LDML format plus repository for required locale data Collation, line breaking, regex, charset mapping, … Used by every major modern operating system, browser, office software, email client,… Core of XML, HTML, Java, C#, C (with ICU), Javascript, … Security ~ Identity System A X = x System B X ≠ x IDN You get an email about your paypal.com account, click on the link… You carefully examine your browser's address box to make sure that it is actually going to http://paypal.com/ … But actually it is going to a spoof site: “paypal.com” with the Cyrillic letter “p”. You (System A) think that they are the same DNS (System B) thinks they are different Examples: Letters Cross-Script p in Latin vs p in Cyrillic In-Script Sequences rn may appear at display sizes like m ! + ा typically looks identical to # so̷s looks like søs Rendering Support ä with two umlauts may look the same as ä with one el is actually e + l Examples: Numbers Western 0 1 2 3 4 5 6 7 8 9 Bengali ৺৺৺৺৺৺৺৺৺৺ Oriya ୱୱୱୱୱୱୱୱୱୱ Thus ৺ୱ = 42 Syntax Spoofing http://example.org/1234/not.mydomain.com http://example.org/1234/not.mydomain.com / = fraction-slash Also possible without Unicode: http://example.org--long-and-obscure-list-of- characters.mydomain.com UTR -
UTR #23: the Unicode Character Property Model
Technical Reports Proposed Update Unicode Technical Report #23 Author Ken Whistler ([email protected]) and Asmus Freytag Editors ([email protected]) Date 2014-08-12 This Version http://www.unicode.org/reports/tr23/tr23-10.html Previous http://www.unicode.org/reports/tr23/tr23-9.html Version Latest http://www.unicode.org/reports/tr23/ Version Revision 10 Summary This document presents a conceptual model of character properties defined in the Unicode Standard. Status This document is a proposed update of a previously approved Unicode Technical Report. This document may be updated, replaced, or superseded by other documents at any time. Publication does not imply endorsement by the Unicode Consortium. This is not a stable document; it is inappropriate to cite this document as other than a work in progress. A Unicode Technical Report (UTR) contains informative material. Conformance to the Unicode Standard does not imply conformance to any UTR. Other specifications, however, are free to make normative references to a UTR. Please submit corrigenda and other comments with the online reporting form [Feedback]. Related information that is useful in understanding this document is found in the References. For the latest version of the Unicode Standard see [Unicode]. For a list of current Unicode Technical Reports see [Reports]. For more information about versions of the Unicode Standard, see [Versions]. Contents 1. Scope 2. Overview 2.1 Origin of Character Properties 2.2 Character Behavior in Context 2.3 Relation of Character Properties to Algorithms 2.4 Code Point Properties and Abstract Character Properties 2.5 Normative Properties 2.6 Informative Properties 2.7 Referring to Properties 2.8 The Unicode Character Database 3. -
Network Working Group D. Goldsmith Request for Comments: 1641 M
Network Working Group D. Goldsmith Request for Comments: 1641 M. Davis Category: Experimental Taligent, Inc. July 1994 Using Unicode with MIME Status of this Memo This memo defines an Experimental Protocol for the Internet community. This memo does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract The Unicode Standard, version 1.1, and ISO/IEC 10646-1:1993(E) jointly define a 16 bit character set (hereafter referred to as Unicode) which encompasses most of the world's writing systems. However, Internet mail (STD 11, RFC 822) currently supports only 7- bit US ASCII as a character set. MIME (RFC 1521 and RFC 1522) extends Internet mail to support different media types and character sets, and thus could support Unicode in mail messages. MIME neither defines Unicode as a permitted character set nor specifies how it would be encoded, although it does provide for the registration of additional character sets over time. This document specifies the usage of Unicode within MIME. Motivation Since Unicode is starting to see widespread commercial adoption, users will want a way to transmit information in this character set in mail messages and other Internet media. Since MIME was expressly designed to allow such extensions and is on the standards track for the Internet, it is the most appropriate means for encoding Unicode. RFC 1521 and RFC 1522 do not define Unicode as an allowed character set, but allow registration of additional character sets. In addition to allowing use of Unicode within MIME bodies, another goal is to specify a way of using Unicode that allows text which consists largely, but not entirely, of US-ASCII characters to be represented in a way that can be read by mail clients who do not understand Unicode. -
Assessment of Options for Handling Full Unicode Character Encodings in MARC21 a Study for the Library of Congress
1 Assessment of Options for Handling Full Unicode Character Encodings in MARC21 A Study for the Library of Congress Part 1: New Scripts Jack Cain Senior Consultant Trylus Computing, Toronto 1 Purpose This assessment intends to study the issues and make recommendations on the possible expansion of the character set repertoire for bibliographic records in MARC21 format. 1.1 “Encoding Scheme” vs. “Repertoire” An encoding scheme contains codes by which characters are represented in computer memory. These codes are organized according to a certain methodology called an encoding scheme. The list of all characters so encoded is referred to as the “repertoire” of characters in the given encoding schemes. For example, ASCII is one encoding scheme, perhaps the one best known to the average non-technical person in North America. “A”, “B”, & “C” are three characters in the repertoire of this encoding scheme. These three characters are assigned encodings 41, 42 & 43 in ASCII (expressed here in hexadecimal). 1.2 MARC8 "MARC8" is the term commonly used to refer both to the encoding scheme and its repertoire as used in MARC records up to 1998. The ‘8’ refers to the fact that, unlike Unicode which is a multi-byte per character code set, the MARC8 encoding scheme is principally made up of multiple one byte tables in which each character is encoded using a single 8 bit byte. (It also includes the EACC set which actually uses fixed length 3 bytes per character.) (For details on MARC8 and its specifications see: http://www.loc.gov/marc/.) MARC8 was introduced around 1968 and was initially limited to essentially Latin script only. -
Unicode Compression: Does Size Really Matter? TR CS-2002-11
Unicode Compression: Does Size Really Matter? TR CS-2002-11 Steve Atkin IBM Globalization Center of Competency International Business Machines Austin, Texas USA 78758 [email protected] Ryan Stansifer Department of Computer Sciences Florida Institute of Technology Melbourne, Florida USA 32901 [email protected] July 2003 Abstract The Unicode standard provides several algorithms, techniques, and strategies for assigning, transmitting, and compressing Unicode characters. These techniques allow Unicode data to be represented in a concise format in several contexts. In this paper we examine several techniques and strategies for compressing Unicode data using the programs gzip and bzip. Unicode compression algorithms known as SCSU and BOCU are also examined. As far as size is concerned, algorithms designed specifically for Unicode may not be necessary. 1 Introduction Characters these days are more than one 8-bit byte. Hence, many are concerned about the space text files use, even in an age of cheap storage. Will storing and transmitting Unicode [18] take a lot more space? In this paper we ask how compression affects Unicode and how Unicode affects compression. 1 Unicode is used to encode natural-language text as opposed to programs or binary data. Just what is natural-language text? The question seems simple, yet there are complications. In the information age we are accustomed to discretization of all kinds: music with, for instance, MP3; and pictures with, for instance, JPG. Also, a vast amount of text is stored and transmitted digitally. Yet discretizing text is not generally considered much of a problem. This may be because the En- glish language, western society, and computer technology all evolved relatively smoothly together. -
New Emoji Requests from Twitter Users: When, Where, Why, and What We Can Do About Them
1 New Emoji Requests from Twitter Users: When, Where, Why, and What We Can Do About Them YUNHE FENG, University of Tennessee, Knoxville, USA ZHENG LU, University of Tennessee, Knoxville, USA WENJUN ZHOU, University of Tennessee, Knoxville, USA ZHIBO WANG, Wuhan University, China QING CAO∗, University of Tennessee, Knoxville, USA As emojis become prevalent in personal communications, people are always looking for new, interesting emojis to express emotions, show attitudes, or simply visualize texts. In this study, we collected more than thirty million tweets mentioning the word “emoji” in a one-year period to study emoji requests on Twitter. First, we filtered out bot-generated tweets and extracted emoji requests from the raw tweets using a comprehensive list of linguistic patterns. To our surprise, some extant emojis, such as fire and hijab , were still frequently requested by many users. A large number of non-existing emojis were also requested, which were classified into one of eight emoji categories by Unicode Standard. We then examined patterns of new emoji requests by exploring their time, location, and context. Eagerness and frustration of not having these emojis were evidenced by our sentiment analysis, and we summarize users’ advocacy channels. Focusing on typical patterns of co-mentioned emojis, we also identified expressions of equity, diversity, and fairness issues due to unreleased but expected emojis, and summarized the significance of new emojis on society. Finally, time- continuity sensitive strategies at multiple time granularity levels were proposed to rank petitioned emojis by the eagerness, and a real-time monitoring system to track new emoji requests is implemented. -
Emojis and the Law
Washington Law Review Volume 93 Number 3 10-1-2018 Emojis and the Law Eric Goldman Follow this and additional works at: https://digitalcommons.law.uw.edu/wlr Part of the Computer Law Commons Recommended Citation Eric Goldman, Emojis and the Law, 93 Wash. L. Rev. 1227 (2018). Available at: https://digitalcommons.law.uw.edu/wlr/vol93/iss3/4 This Article is brought to you for free and open access by the Law Reviews and Journals at UW Law Digital Commons. It has been accepted for inclusion in Washington Law Review by an authorized editor of UW Law Digital Commons. For more information, please contact [email protected]. 08 - Goldman.docx (Do Not Delete) 10/10/2018 5:46 PM EMOJIS AND THE LAW By Eric Goldman* Abstract: Emojis are an increasingly important way we express ourselves. Though emojis may be cute and fun, their usage can lead to misunderstandings with significant legal stakes— such as whether someone should be obligated by contract, liable for sexual harassment, or sent to jail. Our legal system has substantial experience interpreting new forms of content, so it should be equipped to handle emojis. Nevertheless, some special attributes of emojis create extra interpretative challenges. This Article identifies those attributes and proposes how courts should handle them. One particularly troublesome interpretative challenge arises from the different ways platforms depict emojis that are nominally standardized through the Unicode Consortium. These differences can unexpectedly create misunderstandings. The diversity of emoji depictions is not technologically required, nor does it necessarily benefit users. Instead, it likely reflects platforms’ concerns about intellectual property protection for emojis, which forces them to introduce unnecessary variations that create avoidable confusion. -
About the Code Charts 24
The Unicode® Standard Version 13.0 – Core Specification To learn about the latest version of the Unicode Standard, see http://www.unicode.org/versions/latest/. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trade- mark claim, the designations have been printed with initial capital letters or in all capitals. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc., in the United States and other countries. The authors and publisher have taken care in the preparation of this specification, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. The Unicode Character Database and other files are provided as-is by Unicode, Inc. No claims are made as to fitness for any particular purpose. No warranties of any kind are expressed or implied. The recipient agrees to determine applicability of information provided. © 2020 Unicode, Inc. All rights reserved. This publication is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction. For information regarding permissions, inquire at http://www.unicode.org/reporting.html. For information about the Unicode terms of use, please see http://www.unicode.org/copyright.html. The Unicode Standard / the Unicode Consortium; edited by the Unicode Consortium. — Version 13.0. Includes index. ISBN 978-1-936213-26-9 (http://www.unicode.org/versions/Unicode13.0.0/) 1. -
Unicode Character Properties
Unicode character properties Document #: P1628R0 Date: 2019-06-17 Project: Programming Language C++ Audience: SG-16, LEWG Reply-to: Corentin Jabot <[email protected]> 1 Abstract We propose an API to query the properties of Unicode characters as specified by the Unicode Standard and several Unicode Technical Reports. 2 Motivation This API can be used as a foundation for various Unicode algorithms and Unicode facilities such as Unicode-aware regular expressions. Being able to query the properties of Unicode characters is important for any application hoping to correctly handle any textual content, including compilers and parsers, text editors, graphical applications, databases, messaging applications, etc. static_assert(uni::cp_script('C') == uni::script::latin); static_assert(uni::cp_block(U'[ ') == uni::block::misc_pictographs); static_assert(!uni::cp_is<uni::property::xid_start>('1')); static_assert(uni::cp_is<uni::property::xid_continue>('1')); static_assert(uni::cp_age(U'[ ') == uni::version::v10_0); static_assert(uni::cp_is<uni::property::alphabetic>(U'ß')); static_assert(uni::cp_category(U'∩') == uni::category::sm); static_assert(uni::cp_is<uni::category::lowercase_letter>('a')); static_assert(uni::cp_is<uni::category::letter>('a')); 3 Design Consideration 3.1 constexpr An important design decision of this proposal is that it is fully constexpr. Notably, the presented design allows an implementation to only link the Unicode tables that are actually used by a program. This can reduce considerably the size requirements of an Unicode-aware executable as most applications often depend on a small subset of the Unicode properties. While the complete 1 Unicode database has a substantial memory footprint, developers should not pay for the table they don’t use. It also ensures that developers can enforce a specific version of the Unicode Database at compile time and get a consistent and predictable run-time behavior. -
Chapter 6, Writing Systems and Punctuation
The Unicode® Standard Version 13.0 – Core Specification To learn about the latest version of the Unicode Standard, see http://www.unicode.org/versions/latest/. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trade- mark claim, the designations have been printed with initial capital letters or in all capitals. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc., in the United States and other countries. The authors and publisher have taken care in the preparation of this specification, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. The Unicode Character Database and other files are provided as-is by Unicode, Inc. No claims are made as to fitness for any particular purpose. No warranties of any kind are expressed or implied. The recipient agrees to determine applicability of information provided. © 2020 Unicode, Inc. All rights reserved. This publication is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction. For information regarding permissions, inquire at http://www.unicode.org/reporting.html. For information about the Unicode terms of use, please see http://www.unicode.org/copyright.html. The Unicode Standard / the Unicode Consortium; edited by the Unicode Consortium. — Version 13.0. Includes index. ISBN 978-1-936213-26-9 (http://www.unicode.org/versions/Unicode13.0.0/) 1. -
UTS #10: Unicode Collation Algorithm
UTS #10: Unicode Collation Algorithm http://www.unicode.org/reports/tr10/tr10-17.html Technical Reports Proposed Update Unicode Technical Standard #10 UNICODE COLLATION ALGORITHM Version 5.1.0 (draft 2) Authors Mark Davis ([email protected]), Ken Whistler ([email protected]) Date 2007-10-09 This Version http://www.unicode.org/reports/tr10/tr10-17.html Previous http://www.unicode.org/reports/tr10/tr10-16.html Version Latest Version http://www.unicode.org/reports/tr10/ Revision 17 Summary This report provides the specification of the Unicode Collation Algorithm, which provides a specification for how to compare two Unicode strings while remaining conformant to the requirements of The Unicode Standard. The UCA also supplies the Default Unicode Collation Element Table (DUCET) as the data specifying the default collation order for all Unicode characters. Status This is a draft document which may be updated, replaced, or superseded by other documents at any time. Publication does not imply endorsement by the Unicode Consortium. This is not a stable document; it is inappropriate to cite this document as other than a work in progress. A Unicode Technical Standard (UTS) is an independent specification. Conformance to the Unicode Standard does not imply conformance to any UTS. Please submit corrigenda and other comments with the online reporting form [Feedback]. Related information that is useful in understanding this document is found in the References. For the latest version of the Unicode Standard see [Unicode]. For a list of current Unicode Technical Reports see [Reports]. For more information about versions of the Unicode Standard, see [Versions]. -
Program - Session Descriptions
Program - Session Descriptions Monday, October 18, 2010 09:00-12:30 MORNING TUTORIALS Presenter: Track 1: An Introduction to Writing Systems & Unicode Richard Ishida The tutorial will provide you with a good understanding of the many unique Hotel cut-off: Internationalization characteristics of non-Latin writing systems, and illustrate the problems involved in 09/26/2010 Lead, implementing such scripts in products. It does not provide detailed coding advice, but W3C does provide the essential background information you need to understand the Venue: fundamental issues related to Unicode deployment, across a wide range of scripts. It has also proved to be an excellent orientation for newcomers to the conference, providing Hyatt Regency the background needed to assist understanding of the other talks! The tutorial goes Hotel beyond encoding issues to discuss characteristics related to input of ideographs, Santa Clara, CA combining characters, context-dependent shape variation, text direction, vowel signs, USA ligatures, punctuation, wrapping and editing, font issues, sorting and indexing, keyboards, and more. The concepts are introduced through the use of examples from Chinese, Japanese, Korean, Arabic, Hebrew, Thai, Hindi/Tamil, Russian and Greek. While the tutorial is perfectly accessible to beginners, it has also attracted very good reviews from people at an intermediate and advanced level, due to the breadth of scripts discussed. No prior knowledge is needed. Presenter: Track 2: Internationalization: An Introduction, Part I: Characters and Character Encodings Addison Phillips Globalization What is internationalization? What do developers, product managers, or quality engineers Architect need to know about it? How does a software development organization incorporate Lab126 (Amazon) internationalization into the design, implementation, and delivery of an application? This tutorial track provides an introduction to the topics of internationalization, localization and globalization.