I am developing a web app project. What standards should I look at?

Answer: That depends on what you are developing and how the product is meant to be used, but there are some general standards that most projects should be aware of.

Datasets

• JSON (JavaScript Object Notation)
• XML

Character encoding and languages

• UTF-8, ISO/IEC 10646
• ISO 639-1/639-2/639-3

Web standards

• HTML
• CSS
• SSL
• HTTP
• XHTML (eXtensible HTML v1.0)
• FTP
• DNS
• SMTP

Accessibility

• WCAG 2.0/2.1 (Web Content Accessibility Guidelines)

Link and reference

• Uniform Resource Identifier (URI)

Document formats

• OOXML (Office Open XML)
• ODF (Open Document Format)
• PDF (PDF/A-1)
• EPUB 3.0/3.2 (For ebooks)

Multimedia

• SVG (Scalable Vector Graphics)
• PNG (Portable Network Graphics)
• JPEG (Joint Photographic Experts Group)
• Ogg MP3 (Moving Picture Experts Group: Audio Layer III)
• FLAC (Free Lossless Audio Codac)
• H.264 (H.264/MPEG-4 AVC)
• AAC (Advanced Audio Coding)
• MP4 (MPEG-4 Part 14)