var nuxeo = require('nuxeo');

var client = new nuxeo.Client({
  auth: {
    username: 'Administrator',
    password: 'Administrator'
  }
});

client.document('/')
  .fetch(function(error, doc) {
    if (error) {
      // something went wrong
      throw error;
    }

    doc.set({ 'dc:description': 'An updated description' });
    doc.save(function(error, doc) {
      console.log('Successfully updated ' + doc.title + ' with new description: ' + doc.properties['dc:description']);
    });
  });