libxml-rs 0.1.0-alpha.6

Phase 5: XPath 1.0 engine, XPointer, XInclude. Native-Rust forensic reimplementation of libxml2+libxslt with C ABI drop-in replacement. 522 tests passing, full XPath 1.0 lexer/parser/AST/eval (25 functions), XPointer element scheme + shorthand pointers, XInclude process/process_flags, C ABI exports.
Documentation 
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//! RELAX NG implementation (§27, §85 Phase 6).
//!
//! RELAX NG schema validation. libxml2's RELAX NG support is known to be
//! incomplete/non-conformant in places — parity follows the oracle.
//!
//! Phase 0: scaffolded. Implementation begins in Phase 6.