Wordpress Custom Taxonomy

<?php
function pages_taxonomy() {
    register_taxonomy(
        'service_cat',  //1. The name of the taxonomy. Name should be in slug form (must not contain capital letters or spaces). example: portfolio_cat
        'services-items',                  //2. post type name  , custom post id (register_post_type id): example: news_sites
        array(
            'hierarchical'          => true,
            'label'                         => 'Service Category',  //3. Display name
            'query_var'             => true,
            'capabilities' => array(
                'manage__terms' => 'edit_posts',
                'edit_terms' => 'manage_categories',
                'delete_terms' => 'manage_categories',
                'assign_terms' => 'edit_posts'
            ),
            'rewrite'                       => array(
                    'slug'                  => 'service-category', // 4. This controls the base slug that will display before each term
                    'with_front'    => false // Don't display the category base before
                    )
            )
    );
}
add_action( 'init', 'pages_taxonomy');
?>