tripal/tripal_ws/tripal_ws.module

<?php

/**
 * Implements hook_menu().
 * Defines all menu items needed by Tripal Core
 *
 * @ingroup tripal_ws
 */
function tripal_ws_menu() {

  // Web Services API callbacks.
  $items['ws/bio-data/v0.1'] = array(
    'title' => 'Tripal Entities Web Services API v0.1',
    'page callback' => 'tripal_ws_rest',
    'access arguments' => array('access content'),
    'file' => '/includes/tripal_ws.rest.inc',
    'type' => MENU_CALLBACK,
  );

  return $items;
}