Paste XML and get the same data as YAML: no closing tags, no angle brackets. Handy when a project moves its configuration from XML files to YAML.
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XML was the default configuration format for a generation of software, and it is verbose by design: every value is wrapped in an opening and a closing tag. YAML carries the same tree with indentation alone. A forty-line XML file commonly becomes fifteen lines of YAML, and the part a person needs to read — the values — is no longer buried in markup.
The conversion is mechanical. Each element becomes a key, nesting becomes indentation and repeated elements become a list. What needs a decision is the part of XML that YAML has no direct counterpart for.
Written as keys with a prefix — @enabled: true — next to the element's children. After converting, most people rename them to plain keys.
Several <logger> elements become one logger: key holding a list.
With type detection on, 8443 and true become a number and a boolean. Turn it off to keep every value exactly as written.
XML comments are not carried over. Copy the important ones across by hand — YAML comments start with #.
Treat the result as a faithful translation, not a finished file. A tool that reads YAML configuration usually expects its own key names and structure, which rarely match the XML one to one — Spring's application.yml, for example, is not a transliteration of an XML bean file. Convert to see the data clearly, then reshape it to the schema the target tool documents.
The data is preserved: elements, attributes, text and order. Comments, processing instructions and the distinction between an attribute and a child element (other than the prefix) are not part of YAML.
As keys prefixed with @, placed alongside the element's child keys. You can choose a different prefix, or rename the keys afterwards.
Because YAML would otherwise read it as something else — a number, a boolean, or syntax. Quoting keeps the value identical to the XML original.
Yes: convert YAML to JSON, then JSON to XML. The @ prefix on keys turns them back into attributes.
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