WP:Post type and taxonomy registration

index.php

<?php
/*
Plugin Name: AgriLife Publications
Description: Publications Custom Post Type
Version: 1.0
Author: TAMU CIS (not agrilife)
License: GPL2
*/
// Begin - Publication Custom Post Type
add_action( 'init', 'publication_post_type' );
function publication_post_type() {
  $labels = array(
    'name' => _x('Publications', 'post type general name'),
    'singular_name' => _x('Publication', 'post type singular name'),
    'add_new' => _x('Add New Publication', 'equipment item'),
    'add_new_item' => __('Add New Publication'),
    'edit_item' => __('Edit Publication'),
    'new_item' => __('New Publication'),
    'view_item' => __('View Publication'),
    'search_items' => __('Search Publications'),
    'not_found' => __('Nothing found'),
    'not_found_in_trash' => __('Nothing found in Trash'),
    'parent_item_colon' => ''
  );

  $args = array(
    'labels' => $labels,
    'public' => true,
    'publicly_queryable' => true,
    'show_ui' => true,
    'query_var' => true,
    'menu_icon' => '',
    'rewrite' => true,
    'capability_type' => 'post',
    'hierarchical' => false,
    'menu_position' => 5,
    'supports' => array('title', 'editor', 'thumbnail', 'revisions')
  );
  register_post_type('publications', $args);
}
// End - Publications Custom Post Type

// Begin - Publication Taxonomies
add_action('init', 'publication_year_taxonomy');
function publication_year_taxonomy() {
  $labels = array(
    'name' => _x('Year', 'taxonomy general name'),
    'singular_name' => _x('Year', 'taxonomy singular name'),
    'search_items' => __('Search Years'),
    'all_items' => __('All Years'),
    'parent_item' => __('Parent Year'),
    'parent_item_colon' => __('Parent Year:'),
    'edit_item' => __('Edit Year'),
    'update_item' => __('Update Year'),
    'add_new_item' => __('Add New Year'),
    'new_item_name' => __('New Year Name'),
    'menu_name' => __('Year')
  );
  
  $args = array(
    'hierarchical' => true,
    'labels' => $labels,
    'show_ui' => true,
    'query_var' => true,
    'rewrite' => array( 'slug' => 'year' )
  );

  register_taxonomy('year', array('publications'), $args);
}
// End - Publication Taxonomies