XML Encoding

JSON has taken over most modern APIs, but XML is still everywhere you don't choose the protocol. Legacy supplier feeds publish product catalogs as XML. SOAP services that survived the early 2000s still drive enterprise integrations. RSS and Atom feeds, shipping carrier APIs, government data exports, and many ERP systems all speak XML. Go's encoding/xml package handles all of it with an API that deliberately mirrors encoding/json, so most of what you already know about struct tags and streaming applies here too.