tido-mei-validation

Validating MEI in node

Install

git clone https://github.com/tido/mei-validation.git
cd mei-validation
npm install

Java dependency

Beside the npm dependencies, you will also need to have a Java Runtime Environment (JRE) installed.

Usage

You can validate XML strings asynchronously by calling validate, which returns a Promise:

var validation = require('tido-mei-validation');
validation.validate(meiString, schemaPaths)
  .then(report => {
    // process the validation report
    var status = report.isValid ? 'valid' : 'invalid';
    console.log('document is ' + status);
    report.messages.forEach(message => {
      console.log(message.toString());
    });
  })
  .catch(err => console.log(err));

validate depends on a global Promise object, which is available in node natively since v4.0.0. If you'd like to run validation on an older version of Node, you need to install a Promise polyfill.

The synchronous counterpart of validate, validateSync, can be used this way:

var validation = require('tido-mei-validation');
var report = validation.validateSync(meiString, schemaPaths);

Both functions take a string providing the input XML as first argument. The second argument, schemaPaths, must be an object that specifies the paths to an RNG schema and an XSLT stylesheet for Schematron validation with Saxon:

var schemaPaths = {
  rng: 'path/to/rng/schema.rng',
  schematron: 'path/to/schmatron/schema.xsl',
};