What does xml validating reader class do

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(In most cases, the requester agent is the one to initiate this message exchange, though not always.Nonetheless, for consistency we still use the term "requester agent" for the agent that interacts with the provider agent, even in cases when the provider agent actually initiates the exchange.) Note: A word on terminology: Many documents use the term service provider to refer to the provider entity and/or provider agent.To illustrate this distinction, you might implement a particular Web service using one agent one day (perhaps written in one programming language), and a different agent the next day (perhaps written in a different programming language) with the same functionality.Although the agent may have changed, the Web service remains the same..Other systems interact with the Web service in a manner prescribed by its description using SOAP messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards.] A Web service is an abstract notion that must be implemented by a concrete agent.

This document has two main sections: a core concepts section (2 Concepts and Relationships ) and a stakeholder's perspectives section (3 Stakeholder's Perspectives). The Registry Approach The Index Approach Peer-to-Peer (P2P) Discovery Discovery Service Trade-Offs 3.4.3 Federated Discovery Services 3.4.4 Functional Descriptions and Discovery 3.5 Web Service Semantics 3.5.1 Message semantics and visibility 3.5.2 Semantics of the Architectural Models 3.5.3 The Role of Metadata 3.6 Web Services Security 3.6.1 Security policies 3.6.2 Message Level Security Threats Message Alteration Confidentiality Man-in-the-middle Spoofing Denial of Service Replay Attacks 3.6.3 Web Services Security Requirements Authentication Mechanisms Authorization Data Integrity and Data Confidentiality Integrity of Transactions and Communications Non-Repudiation End-to-End Integrity and Confidentiality of Messages Audit Trails Distributed Enforcement of Security Policies 3.6.4 Security Consideration of This Architecture Cross-Domain Identities Distributed Policies Trust Policies Secure Discovery Mechanism Trust and Discovery Secure Messaging 3.6.5 Privacy Considerations 3.7 Peer-to-Peer Interaction 3.8 Web Services Reliability 3.8.1 Message reliability 3.8.2 Service reliability 3.8.3 Reliability and management 3.9 Web Service Management 3.10 Web Services and EDI: Transaction Tracking 3.10.1 When Something Goes Wrong 3.10.2 The Need for Tracking 3.10.3 Examples of Tracking 3.10.4 Requirements for Effective Tracking 3.10.5 Tracking and URIs 4 Conclusions 4.1 Requirements Analysis 4.2 Value of This Work 4.3 Significant Unresolved Issues A Overview of Web Services Specifications (Non-Normative) B An Overview of Web Services Security Technologies (Non-Normative) B.1 XML-Signature and XML-Encryption B.2 Web Services Security B.3 XML Key Management Specification (XKMS) 2.0 B.4 Security Assertion Markup Language (SAML) B.5 XACML: Communicating Policy Information B.6 Identity Federation C References (Non-Normative) D Acknowledgments (Non-Normative) Web services provide a standard means of interoperating between different software applications, running on a variety of platforms and/or frameworks.This document (WSA) is intended to provide a common definition of a Web service, and define its place within a larger Web services framework to guide the community.Using this assertion as a basis, we can assess conformance to the architecture of a particular resource by looking for its identifier.If, in a given instance of this architecture, a resource has no identifier, then it is not a valid instance of the architecture.

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