RelaxNG Schema Checking in the Browser

[Jason Siefken]

I recently came across https://github.com/dholroyd/relaxng-rust which is a Rust implementation of the RelaxNG algorithm. Since Rust compiles to WASM, which runs in the browse, I made an experiment: https://github.com/siefkenj/relaxng_validator_wasm  It checks Pretext source against the RelaxNG grammar. It runs live in a playground here:

https://siefkenj.github.io/relaxng_validator_wasm/

This means no need for a Java install to get schema checking.

I discussed with Oscar about getting schema checking into the CLI (since this tools outputs schema violations as JSON, it should be easier to work with). This could also result in schema checking for all examples in the docs.