Expand description
XML Catalog support (§26, §85 Phase 4).
OASIS XML Catalog resolution, catalog lookup order, precedence, catalog loading, SGML catalog compatibility.
Implements the OASIS XML Catalog specification (xCatalog) with compatibility for SGML (SOLEX) catalog format.
§UPSTREAM-PARITY
Matches libxml2’s catalog behavior:
- XML Catalog format (OASIS TR 9401:1999)
- SGML catalog format (SOLEX)
- Environment variables: XML_CATALOG_FILES, SGML_CATALOG_FILES
- Default catalog location: /etc/xml/catalog
- Catalog entry types: public, system, rewriteSystem, rewriteURI, delegatePublic, delegateSystem, delegateURI, nextCatalog, group
- Resolution order: public → system → URI