# Code Lists Overview

A code list is a controlled set of allowable labels or codes represented as an alphanumeric attribute. The pages in this section show the code lists used within the OS NGD. Some of the code lists apply to attributes of multiple feature types, whereas others will only apply to attributes of one feature type.

The pages in this section display the OS NGD code lists in alphabetical order, with one code list provided per page.

Any code lists released in the last six months will have a 'new' emoji (🆕) against their name so they are easy to spot in the navigation menu.

## What's next?

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f5c3">🗃️</span> Data Structure</h3></td><td>Learn about the OS NGD data structure and the data available for each theme, collection and feature type.</td><td><a href="../data-structure/data-structure-information">data-structure-information</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f4d6">📖</span> OS NGD Fundamentals</h3></td><td>OS NGD Fundamentals covers the core elements of OS NGD design, including available data formats and file naming, data schema versioning, access methods, data ordering and currency, attribute information for feature types, unique identifiers and coordinate reference systems.</td><td><a href="../getting-started/os-ngd-fundamentals">os-ngd-fundamentals</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="25b6">▶️</span> Getting Started</h3></td><td>Our getting started guides will help you access, use and style OS NGD data. <br><br>You'll also find FAQs, in-depth information on OS NGD design, and webinars, tutorials and case studies.</td><td><a href="../getting-started/getting-started-information">getting-started-information</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f4e3">📣</span> OS NGD News</h3></td><td>Learn about new data enhancements and service updates released for the OS NGD, the change log, improvements, planned future data enhancements and recent announcements.</td><td><a href="../os-ngd-news/os-ngd-news">os-ngd-news</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="2699">⚙️</span> Data and Service Status</h3></td><td>Find out about OS NGD planned maintenance, any live service disruption, current data issues and resolved data issues.</td><td><a href="../data-and-service-status/data-and-service-status-information">data-and-service-status-information</a></td></tr><tr><td><h3><span data-gb-custom-inline data-tag="emoji" data-code="1f5fa">🗺️</span> OS NGD Sample Data</h3></td><td>Download OS NGD sample data or visualise it online.</td><td><a href="../introduction-to-os-ngd/os-ngd-sample-data">os-ngd-sample-data</a></td></tr></tbody></table>