Cloud Glossary: Letter X

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X

XML (eXtensible Markup Language)

A markup language that defines rules for encoding documents in a format that is both human-readable and machine-readable.

XaaS (Everything as a Service)

A cloud computing service model that encompasses all forms of service delivery including SaaS, PaaS, and IaaS.

XSS (Cross-Site Scripting)

A security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users.

XPATH (XML Path Language)

A query language for selecting nodes from XML documents and computing values from XML content.

XSLT (eXtensible Stylesheet Language Transformations)

A language for transforming XML documents into other formats such as HTML, text, or other XML documents.

X.509 Certificate

A standard format for public key certificates used in various internet protocols including TLS/SSL.

XMPP (Extensible Messaging and Presence Protocol)

A communication protocol for message-oriented middleware based on XML for real-time communication.

XML Schema

A description of the structure and constraints of XML documents, defining elements, attributes, and data types.

XML Parser

A software component that processes XML documents and makes their content available to applications.

X-Forwarded-For Header

An HTTP header that identifies the originating IP address of a client connecting through a proxy or load balancer.

X-Frame-Options

An HTTP response header that indicates whether a browser should be allowed to render a page in a frame or iframe.

XOR (Exclusive OR)

A logical operation that outputs true only when inputs differ, commonly used in encryption and data processing.

XML Namespace

A method for avoiding element name conflicts in XML documents by qualifying element names with namespace identifiers.

XML-RPC

A remote procedure call protocol that uses XML to encode calls and HTTP as a transport mechanism.

X-Requested-With Header

An HTTP header commonly used to identify Ajax requests made by JavaScript frameworks.

XML API

An application programming interface that uses XML format for request and response message exchange.

X-Content-Type-Options

An HTTP header that prevents browsers from MIME-sniffing a response away from the declared content-type.

XSRF (Cross-Site Request Forgery)

A type of malicious exploit where unauthorized commands are transmitted from a user that a web application trusts.

XML Database

A database designed to store, query, and manage XML documents while preserving their hierarchical structure.

X-XSS-Protection

An HTTP header that enables cross-site scripting filters built into most web browsers.

XML Validation

The process of checking whether an XML document conforms to a specified schema or DTD.

X-Real-IP Header

An HTTP header used by proxies to convey the original client IP address to backend servers.

XACML (eXtensible Access Control Markup Language)

A declarative access control policy language implemented in XML for managing authorization policies.

XML Encoding

The specification of character encoding used in XML documents, typically UTF-8 or UTF-16.

X-Forwarded-Proto Header

An HTTP header that indicates the protocol (HTTP or HTTPS) used by the client to connect to a proxy or load balancer.

XML Web Services

Web services that use XML-based messaging protocols for communication between applications over networks.

X-Auth-Token

An HTTP header commonly used to pass authentication tokens for API access and user session management.

XML Transformation

The process of converting XML documents from one format or structure to another using tools like XSLT.