A markup language combines text and extra information about the text. The extra information, for example about the text's structure or presentation, is expressed using markup, which is intermingled with the primary text.
XML is a meta-markup language that enables the creation of markup languages for particular documents and domains.
XML tags describe the structure and semantics of a document’s content, not the format of the content. The format is described in a separate style sheet.
XML documents are created in an editor, read by a parser, and displayed by a browser.
XML on the Web rests on the foundations provided by HTML, CSS, and URLs.
Numerous supporting technologies layer on top of XML, including XSL style sheets, XLinks, and XPointers. These let you do more than you can accomplish with just CSS and URLs.
XML tags are not predefined. You must define your own tags
XML stands for Extensible Markup Language. XML is a simple, very flexible text format derived from Standard Generalized Markup Language (SGML - ISO 8879). Originally designed to meet the challenges of large-scale electronic publishing, XML is also playing an increasingly important role in management, display, organization and the exchange of a wide variety of data on the Web and elsewhere.
What is Windows CardSpace (WCS, formerly “InfoCard”)?
Windows CardSpace is a Microsoft .NET Framework version 3.0 (formerly WinFX) component that provides the consistent user experience required by the identity metasystem. It is specifically hardened against tampering and spoofing to protect the end user's digital identities and maintain end-user control.
Windows Workflow Foundation is the programming model, engine and tools for quickly building workflow enabled applications on Windows. It consists of a .NET Framework version 3.0 (formerly WinFX) namespace, an in-process workflow engine, and designers for Visual Studio 2005. Windows Workflow Foundation is available for both client and server versions of Windows. Windows Workflow Foundation includes support for both system workflow and human workflow across a wide range of scenarios including: workflow within line of business applications, user interface page-flow, document-centric workflow, human workflow, composite workflow for service oriented applications, business rule driven workflow and workflow for systems management.
Windows Communication Foundation (formerly code-named "Indigo") is a set of .NET technologies for building and running connected systems. It is a new breed of communications infrastructure built around the Web services architecture. Advanced Web services support in Windows Communication Foundation provides secure, reliable, and transacted messaging along with interoperability. The service-oriented programming model of Windows Communication Foundation is built on the Microsoft .NET Framework and simplifies development of connected systems. Windows Communication Foundation unifies a broad array of distributed systems capabilities in a composable and extensible architecture, spanning transports, security systems, messaging patterns, encodings, network topologies, and hosting models. Windows Communication Foundation is available for Windows Vista™ as well as for Windows XP and Windows Server 2003.