Resources

RSS & Atom

• RSS on Wikipedia
• What is RSS? #1
• What is RSS? #2
• Atom on Wikipedia
• The Atom Syndication Format and Publishing Protocol
• Introduction to Atom Syndication Format
• Comparison of RSS and Atom Web Feed Formats
• RSS 1.0 (RDF) specification

XML

• XML on Wikipedia
• Introduction to XML from Oracle
• XML FAQ

Internet Standards

• RFC 4287 – "The Atom Syndication Format"
• RFC 5023 – "The Atom Publishing Protocol"
• RFC822 - Standard for the Format of ARPA Internet Text Messages
• RFC3339 - Date and Time on the Internet: Timestamps

Regular Expressions

• Regular Expressions on Wikipedia
• Regular-Expressions.info
• Perl Compatible Regular Expressions (PCRE)

UserAgents

• Understanding UserAgent Strings (Microsoft)
• Check your UserAgent