Question 1

How do I use SXD-XPath to query XML in Rust?

Accepted Answer

Add the `sxd-xpath` and `sxd-document` crates to your Cargo.toml, parse XML with `sxd-document`, then use the XPath evaluator to apply expressions. For example, load an XML string and call methods like `evaluate` to select nodes based on XPath queries.

Question 2

SXD-XPath vs xml-rs for Rust XML processing?

Accepted Answer

SXD-XPath specializes in XPath 1.0 evaluation with a separate DOM crate, while xml-rs is a general-purpose XML parser. Choose SXD-XPath for robust XPath querying, but xml-rs might be simpler for basic parsing without XPath needs.

Question 3

Does SXD-XPath support XML namespaces?

Accepted Answer

Yes, as part of the XPath 1.0 specification, it supports namespaces. You'll need to handle namespace declarations in your XML and use appropriate XPath syntax, such as prefix-based queries, as detailed in the documentation.

Question 4

How to install SXD-XPath with Cargo?

Accepted Answer

Run `cargo add sxd-xpath` and `cargo add sxd-document` in your project directory to include both crates. Then, import them in your Rust code to start using the DOM and XPath functionalities.

Question 5

What are the performance benchmarks for SXD-XPath?

Accepted Answer

Performance is not extensively benchmarked in the README; as a pure Rust library, it may trade some optimization for safety compared to C-based alternatives. For critical applications, test with your specific XML data to assess speed and memory usage.

Question 6

Can SXD-XPath handle large XML files?

Accepted Answer

It uses a DOM-based approach with `sxd-document`, loading the entire XML into memory, which may not be efficient for very large files. Consider streaming parsers for big data, but SXD-XPath is suitable for moderate-sized documents.

Question 7

Is SXD-XPath compatible with async Rust?

Accepted Answer

The library is synchronous by design; for async applications, you'd need to wrap it in blocking tasks or use Tokio's blocking threads. There's no native async support mentioned, so it might not fit seamlessly into async-heavy codebases.

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