All references are normative unless marked "Non-normative".

Augmented BNF for Syntax Specifications: ABNF (URL:, D. Crocker, P. Overell. IETF.
The 'about' URI scheme (URL:, S. Moonesamy. IETF.
(Non-normative) APNG Specification (URL: S. Parmenter, V. Vukicevic, A. Smith. Mozilla.
Accessible Rich Internet Applications (WAI-ARIA) (URL:, J. Craig, M. Cooper, L. Pappas, R. Schwerdtfeger, L. Seeman. W3C.
WAI-ARIA 1.0 User Agent Implementation Guide (URL:, A. Snow-Weaver, M. Cooper. W3C.
(Non-normative) Authoring Tool Accessibility Guidelines (ATAG) 2.0 (URL:, J. Richards, J. Spellman, J. Treviranus. W3C.
(Non-normative) The Atom Syndication Format (URL:, M. Nottingham, R. Sayre. IETF.
Tags for Identifying Languages; Matching of Language Tags (URL:, A. Phillips, M. Davis. IETF.
Behavioral Extensions to CSS (URL:, I. Hickson. W3C.
UAX #9: Unicode Bidirectional Algorithm (URL:, M. Davis. Unicode Consortium.
(Non-normative) UTN #6: BOCU-1: MIME-Compatible Unicode Compression (URL:, M. Scherer, M. Davis. Unicode Consortium.
HTML Canvas 2D Context (URL:, R. Cabanier, E. Graff, J. Munro, T. Wiltzius. W3C.
(Non-normative) UTR #26: Compatibility Encoding Scheme For UTF-16: 8-BIT (CESU-8) (URL:, T. Phipps. Unicode Consortium.
(Non-normative) Character Model for the World Wide Web 1.0: Fundamentals (URL:, M. Dürst, F. Yergeau, R. Ishida, M. Wolf, T. Texin. W3C.
Unicode Common Locale Data Repository (URL: Unicode.
(Non-normative) On computable numbers, with an application to the Entscheidungsproblem (URL:, A. Turing. In Proceedings of the London Mathematical Society, series 2, volume 42, pages 230-265. London Mathematical Society, 1937.
HTTP State Management Mechanism (URL:, A. Barth. IETF.
(Non-normative) CP50220 (URL:, Y. Naruse. IANA.
(Non-normative) Content Security Policy (URL:, B. Sterne, A. Barth. W3C.
Cascading Style Sheets Level 2 Revision 1 (URL:, B. Bos, T. Çelik, I. Hickson, H. Lie. W3C.
(Non-normative) CSS Animations (URL:, D. Jackson, D. Hyatt, C. Marrin, S. Galineau, L. Baron. W3C.
CSS Styling Attribute Syntax (URL:, T. Çelik, E. Etemad. W3C.
CSS Color Module Level 3 (URL:, T. Çelik, C. Lilley, L. Baron. W3C.
(Non-normative) CSS Font Loading (URL:, T. Atkins. W3C.
CSS Fonts (URL:, J. Daggett. W3C.
CSS Generated Content (URL:, H. Lie, E. Etemad, I. Hickson. W3C.
CSS Image Values and Replaced Content Module (URL:, E. Etemad, T. Atkins. W3C.
Cascading Style Sheets Object Model (CSSOM) (URL:, S. Pieters, G. Adams. W3C.
CSSOM View Module (URL:, S. Pieters, G. Adams. W3C.
CSS Ruby Module Level 1 (URL:, E. Etemad, K. Ishii, R. Ishida. W3C.
(Non-normative) CSS Transitions (URL:, D. Jackson, D. Hyatt, C. Marrin, L. Baron. W3C.
CSS3 Basic User Interface Module (URL:, T. Çelik. W3C.
CSS Scoping (URL:, T. Atkins, E. Etemad. W3C.
CSS Syntax (URL:, T. Atkins, S. Sapin. W3C.
CSS3 Values and Units (URL:, H. Lie, T. Atkins, E. Etemad. W3C.
CSS Writing Modes (URL:, E. Etemad, K. Ishii. W3C.
Dynamic adaptive streaming over HTTP (DASH) (URL: ISO.
DOM (URL:, A. van Kesteren, A. Gregor, Ms2ger, A. Russell, R. Berjon. W3C.
Document Object Model (DOM) Level 3 Events Specification (URL:, T. Leithead, J. Rossi, D. Schepers, B. Höhrmann, P. Le Hégaret, T. Pixley. W3C.
DOM Parsing and Serialization (URL:, T. Leithead. Work in Progress. W3C.
(Non-normative) The DOT Language (URL: Graphviz.
ECMAScript Language Specification (URL: ECMA.
HTML Editing APIs (URL:, A. Gregor. W3C Editing APIs CG.
Encoding (URL:, A. van Kesteren, J. Bell, A. Phillips. W3C.
Server-Sent Events (URL:, I. Hickson. W3C.
Fetch (URL:, A. van Kesteren. WHATWG.
File API (URL:, A. Ranganathan. W3C.
Fullscreen (URL:, A. van Kesteren, T. Çelik. W3C.
(Non-normative) Graphics Interchange Format (URL: CompuServe.
(Non-normative) Computer Graphics: Principles and Practice in C, Second Edition, J. Foley, A. van Dam, S. Feiner, J. Hughes. Addison-Wesley. ISBN 0-201-84840-6.
(Non-normative) Inter Gravissimas, A. Lilius, C. Clavius. Gregory XIII Papal Bull, February 1582.
HTML to Platform Accessibility APIs Implementation Guide (URL: W3C.
(Non-normative) HTML5 differences from HTML4 (URL:, S. Pieters. W3C.
Hypertext Transfer Protocol — HTTP/1.1 (URL:, R. Fielding, J. Gettys, J. Mogul, H. Frystyk, L. Masinter, P. Leach, T. Berners-Lee. IETF.
(Non-normative) HTTP Over TLS (URL:, E. Rescorla. IETF.
Permanent Message Header Field Names (URL: IANA.
(Non-normative) Sourcing In-band Media Resource Tracks from Media Containers into HTML (URL:, S. Pfeiffer, B. Lund. W3C.
ISO 3166: Codes for the representation of names of countries and their subdivisions (URL: ISO.
(Non-normative) ISO8601: Data elements and interchange formats — Information interchange — Representation of dates and times (URL: ISO.
Requirements for Japanese Text Layout (URL: W3C.
JPEG File Interchange Format (URL:, E. Hamilton.
(Non-normative) The 'mailto' URI scheme (URL:, M. Duerst, L. Masinter, J. Zawinski. IETF.
Mathematical Markup Language (MathML) (URL:, D. Carlisle, P. Ion, R. Miner, N. Poppelier. W3C.
Media Fragments URI 1.0 (URL:, R. Troncy, E. Mannens, S. Pfeiffer, D. Van Deursen. W3C CR.
Microformats Wiki: existing rel values (URL: Microformats.
MIME Sniffing (URL:, G. Hemsley. WHATWG.
MNG (Multiple-image Network Graphics) Format (URL: G. Randers-Pehrson.
ISO/IEC 13818-1: Information technology — Generic coding of moving pictures and associated audio information: Systems. ISO/IEC.
ISO/IEC 14496-12: ISO base media file format. ISO/IEC.
Media Queries (URL:, H. Lie, T. Çelik, D. Glazman, A. van Kesteren. W3C.
(Non-normative) Gecko Plugin API Reference (URL: Mozilla.
SkeletonHeaders (URL: Xiph.Org.
Autodiscovery in HTML/XHTML (URL: In OpenSearch 1.1 Draft 4, Section 4.6.2.
The Web Origin Concept (URL:, A. Barth. IETF.
(Non-normative) Page Visibility (URL:, J. Mann, A. Jain. W3C.
(Non-normative) Document management — Portable document format — Part 1: PDF (URL: ISO.
Portable Network Graphics (PNG) Specification (URL:, D. Duce. W3C.
Pointer Lock (URL:, V. Scheib. W3C.
(Non-normative) Polyglot Markup: HTML-Compatible XHTML Documents (URL:, E. Graff. W3C.
(Non-normative) The Properties and Promises of UTF-8 (URL:, M. Dürst. University of Zürich. In Proceedings of the 11th International Unicode Conference.
Public Suffix List (URL: Mozilla Foundation.
Domain Names - Concepts and Facilities (URL:, P. Mockapetris. IETF, November 1987.
Requirements for Internet Hosts -- Application and Support (URL:, R. Braden. IETF, October 1989.
(Non-normative) Character Mnemonics and Character Sets (URL:, K. Simonsen. IETF.
(Non-normative) Japanese Character Encoding for Internet Messages (URL:, J. Murai, M. Crispin, E. van der Poel. IETF.
(Non-normative) ISO-2022-JP-2: Multilingual Extension of ISO-2022-JP (URL:, M. Ohta, K. Handa. IETF.
(Non-normative) Korean Character Encoding for Internet Messages (URL:, U. Choi, K. Chon, H. Park. IETF.
(Non-normative) ASCII Printable Characters-Based Chinese Character Encoding for Internet Messages (URL:, Y. Wei, Y. Zhang, J. Li, J. Ding, Y. Jiang. IETF.
(Non-normative) Chinese Character Encoding for Internet Messages (URL:, HF. Zhu, DY. Hu, ZG. Wang, TC. Kao, WCH. Chang, M. Crispin. IETF.
Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types (URL:, N. Freed, N. Borenstein. IETF.
Key words for use in RFCs to Indicate Requirement Levels (URL:, S. Bradner. IETF.
(Non-normative) Japanese Character Encoding for Internet Messages (URL:, K. Tamaru. IETF.
PKCS #1: RSA Encryption (URL:, B. Kaliski. IETF.
The text/css Media Type (URL:, H. Lie, B. Bos, C. Lilley. IETF.
Returning Values from Forms: multipart/form-data (URL:, L. Masinter. IETF.
The "data" URL scheme (URL:, L. Masinter. IETF.
URI Resolution Services Necessary for URN Resolution (URL:, M. Mealling, R. Daniel. IETF.
The Text/Plain Format and DelSp Parameters (URL:, R. Gellens. IETF.
XML Media Types (URL:, M. Murata, S. St. Laurent, D. Kohn. IETF.
Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile (URL:, W. Polk, R. Housley, L. Bassham. IETF.
Internationalizing Domain Names in Applications (IDNA) (URL:, P. Faltstrom, P. Hoffman, A. Costello. IETF.
The Codecs Parameter for "Bucket" Media Types (URL:, R. Gellens, D. Singer, P. Frojdh. IETF.
(Non-normative) Scripting Media Types (URL:, B. Höhrmann. IETF.
Guidelines and Registration Procedures for New URI Schemes (URL:, T. Hansen, T. Hardie, L. Masinter. IETF.
The Base16, Base32, and Base64 Data Encodings (URL:, S. Josefsson. IETF.
Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile (URL:, D. Cooper, S. Santesson, S. Farrell, S. Boeyen, R. Housley, W. Polk. IETF.
Internet Message Format (URL:, P. Resnick. IETF.
URI Scheme for Global System for Mobile Communications (GSM) Short Message Service (SMS) (URL:, E. Wilde, A. Vaha-Sipila. IETF.
Use of the Content-Disposition Header Field in the Hypertext Transfer Protocol (HTTP) (URL:, J. Reschke. IETF.
vCard Format Specification (URL:, S. Perreault. IETF.
(Non-normative) Use Cases & Exploratory Approaches for Ruby Markup (URL:, R. Ishida. W3C.
(Non-normative) UTR #6: A Standard Compression Scheme For Unicode (URL:, M. Wolf, K. Whistler, C. Wicksteed, M. Davis, A. Freytag, M. Scherer. Unicode Consortium.
Selectors (URL:, E. Etemad, T. Çelik, D. Glazman, I. Hickson, P. Linss, J. Williams. W3C.
IEC 61966-2-1: Multimedia systems and equipment — Colour measurement and management — Part 2-1: Colour management — Default RGB colour space — sRGB (URL:!OpenDocument&Click=). IEC.
Scalable Vector Graphics (SVG) Tiny 1.2 Specification (URL:, O. Andersson, R. Berjon, E. Dahlström, A. Emmons, J. Ferraiolo, A. Grasso, V. Hardy, S. Hayman, D. Jackson, C. Lilley, C. McCormack, A. Neumann, C. Northway, A. Quint, N. Ramani, D. Schepers, A. Shellshear. W3C.
(Non-normative) Tor (URL:
Touch Events (URL:, D. Schepers, S. Moon, M. Brubeck, A. Barstow. W3C.
(Non-normative) Working with Time Zones (URL:, A. Phillips, N. Lindenberg, M. Davis, M.J. Dürst, F. Sasaki, R. Ishida. W3C.
(Non-normative) Time Zone Database (URL: IANA.
(Non-normative) User Agent Accessibility Guidelines (UAAG) 2.0 (URL:, J. Allan, K. Ford, J. Richards, J. Spellman. W3C.
UTR #10: Unicode Collation Algorithm (URL:, M. Davis, K. Whistler. Unicode Consortium.
UndoManager and DOM Transaction (URL:, R. Niwa.
The Unicode Standard (URL: Unicode Consortium.
(Non-normative) A composite approach to language/encoding detection (URL:, S. Li, K. Momoi. Netscape. In Proceedings of the 19th International Unicode Conference.
URL (URL:, A. van Kesteren. WHATWG.
(Non-normative) UTF-7: A Mail-Safe Transformation Format of Unicode (URL:, D. Goldsmith, M. Davis. IETF.
(Non-normative) Multilingual form encoding (URL:, M. Dürst. W3C.
(Non-normative) UTR #36: Unicode Security Considerations (URL:, M. Davis, M. Suignard. Unicode Consortium.
(Non-normative) Web Content Accessibility Guidelines (WCAG) 2.0 (URL:, B. Caldwell, M. Cooper, L. Reid, G. Vanderheiden. W3C.
WebGL Specification (URL:, D. Jackson. Khronos Group.
Web IDL (URL:, C. McCormack. W3C.
Web Linking (URL:, M. Nottingham. IETF.
Web Messaging (URL:, I. Hickson. W3C.
WebM Container Guidelines (URL: The WebM Project.
Web Storage (URL:, I. Hickson. W3C.
WebVTT (URL:, I. Hickson. W3C.
Web Workers (URL:, I. Hickson. W3C.
The WebSocket protocol (URL:, I. Fette, A. Melnikov. IETF.
Recommendation X.690 — Information Technology — ASN.1 Encoding Rules — Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER), and Distinguished Encoding Rules (DER) (URL: International Telecommunication Union.
XMLHttpRequest (URL:, A. van Kesteren. WHATWG.
Extensible Markup Language (URL:, T. Bray, J. Paoli, C. Sperberg-McQueen, E. Maler, F. Yergeau. W3C.
XML Base (URL:, J. Marsh, R. Tobin. W3C.
Namespaces in XML (URL:, T. Bray, D. Hollander, A. Layman, R. Tobin. W3C.
XML Path Language (XPath) Version 1.0 (URL:, J. Clark, S. DeRose. W3C.
(Non-normative) XSL Transformations (XSLT) Version 1.0 (URL:, J. Clark. W3C.