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DevOps & Automation · Foundational

Extensible Markup Language (XML)

A markup language for structured data using nested, tag-delimited elements with attributes and namespaces.

Definition

XML is used by NETCONF, SOAP, and many legacy systems. Documents must be well-formed with a single root element. Namespaces (xmlns) avoid name collisions; schemas (XSD) validate structure. Python parses it with xml.etree.ElementTree, lxml, or xmltodict.

Example

<interface><name>Gi1</name><enabled>true</enabled></interface>

Exam tip

NETCONF payloads are XML; RESTCONF supports both XML and JSON.

Don't confuse it with

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