What is Web architecture?

As cited in the year 2004, a public working document, [ the TAG ], explains to us that there are a number of architectural principles that underlie the development of the World Wide Web. Some of these are well-known; others are less well-known or accepted.
(...) Web architecture refers to the underlying principles that should be adhered to by all Web components, whether developed inside or outside W3C. The architecture captures principles that affect such things as understandability, interoperability, scalability, accessibility, and internationalization.

For understandability, it is important that specifications be built on a common framework. This framework will provide a clearer picture of how specifications for Web technology work together.

For interoperability, there are some principles that cross Working Group boundaries to allow technical specifications to work together. For example, W3C has adopted an architectural principle that XML should be used for the syntax of Web formats unless there is a truly compelling reason not to (refer to "Assumed Syntax", by Tim Berners-Lee). This principle allows broad applicability of generic XML tools and is more likely to lead to general protocol elements that are useful for multiple purposes.

For scalability, it is important to base current work on wide applicability and future extensibility. For example, it is a common principle in designing specifications to avoid single points of control (e.g., a single registry that all specification writers or developers must use).
Web Architecture, a professional area and a subset of the Web technology -- (e.g., "Design Issues," "What is a Good Standard?," and "Common User Agent Problems,") ---, explained and defined by the W3C's Technical Architecture Group (TAG) Charter

W3C's Web Accessibility Initiative and Internationalization Activity are already producing Architectural Recommendations in the areas of accessibility and internationalization, respectively.

Circa 2004, repeat, 2004.
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