data parse_error ai_generated true

XMLSyntaxError: namespace prefix already declared

ID: data/xml-namespace-collision

Also available as: JSON · Markdown
80%Fix Rate
84%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
any active — — —

Root Cause

XML namespaces conflicting between merged documents.

generic

Workarounds

  1. 88% success Use namespace-aware parsing: lxml with nsmap
  2. 85% success Define unique prefixes per source when merging XML docs

Dead Ends

Common approaches that don't work:

  1. Strip all namespaces 78% fail

    Loses element disambiguation

  2. Rename prefixes globally 75% fail

    Breaks XPath and XSLT references