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Ideas and Plans

Here are some ideas and plans for Xee, some fanciful, some more concrete:

Concrete

  • Complete XPath implementation - this involves implementing missing XPath functions. See conformance/fn-todo.md for a list.

  • XSLT implementation (except for streaming). A lot of basics are there, but an awful lot remains to be done. See conformance/xslt.md for a list.

  • Complete PHP bindings for XPath - datatype support, the basics to get information from a Xot node (non-structural, just attributes, text, etc), documentation.

  • Externally pluggable library functions written in Rust.

  • Externally pluggable library functions written in PHP.

Challenging

  • Higher level interpreter bytecodes for optimization of common operations. Using a hashmap for common operations.

  • XSLT streaming.

  • Integrate the Xust XML Schema implementation. Support for user-defined schema types.

  • Expand XPath to XQuery

  • Other standards such as XProc

Very fancyful

  • Type inference

  • Compiler using Cranelift. AOT means type inference is required. A JIT may get away without it?