Expand description
A Rust implementation of the XQuery and XPath Data Model 3.1.
The library separates parsing from evaluation. An expression is compiled to create a ‘Sequence Constructor’. This constructor is then applied to a source document to produce a Sequence.
A Sequence is an ordered collection of zero or more Items, implemented as a Rust Vector. An Item is a Node, Function or atomic Value.
See the graphitem module for an example of how to evaluate an XSL stylesheet.
Status
The project, so far, is a proof-of-concept.
For XPath it provides most of v1.0 functionality, with some v2.0 and v3.1 features.
The XSLT implementation is bare-bones. It supports basic templating, literal result elements, attributes, and text. Also conditionals (if, choose), repetition (for-each, for-each-group), and copying (copy, copy-of).
NB, the library has not been extensively tested.
Plan
- Complete the XPath 1.0 implementation.
- Implement all v1.0 XSLT functionality.
- Implement all XPath 3.1 data model and functions.
- Complete the v3.1 XSLT engine.
Goals / Future Work
- The library should always return errors, i.e. it should not panic
- The library uses dynamic Trait objects for tree navigation and construction, but this imposes a runtime penalty. Use monomorphisation to use traits statically at compile-time.
- Make the library more idiomatically Rust
Contributions
We need your help!
- Download the crate and try it out. Tell us what you like or don’t like. How can it be improved?
- Let us know what doesn’t work. Submit a bug report.
- Do you need more documentation? There can never be enough!
- Add some tests.
- Write some code.
- Donate resources (i.e. $$$)
Re-exports
pub use xdmerror::Error;pub use xdmerror::ErrorKind;pub use item::Sequence;pub use item::SequenceTrait;pub use item::Item;pub use item::Value;pub use item::Document;pub use item::Node;pub use xpath::parse;pub use evaluate::StaticContext;pub use evaluate::static_analysis;pub use evaluate::DynamicContext;pub use evaluate::evaluate;pub use evaluate::Constructor;pub use xslt::from_document;