public java.util.Map<String, String> getUserMetadata() {
        if (userMetadata == null) {
            userMetadata = new com.amazonaws.internal.SdkInternalMap<String, String>();
        }
        return userMetadata;
    }
<p>
User-defined metadata that you want to associate with an Elastic Transcoder job. You specify metadata in
<code>key/value</code> pairs, and you can add up to 10 <code>key/value</code> pairs per job. Elastic Transcoder
does not guarantee that <code>key/value</code> pairs are returned in the same order in which you specify them.
</p>
<p>
Metadata <code>keys</code> and <code>values</code> must use characters from the following list:
</p>
<ul>
<li>
<p>
<code>0-9</code>
</p>
</li>
<li>
<p>
<code>A-Z</code> and <code>a-z</code>
</p>
</li>
<li>
<p>
<code>Space</code>
</p>
</li>
<li>
<p>
The following symbols: <code>_.:/=+-%@</code>
</p>
</li>
</ul>

@return User-defined metadata that you want to associate with an Elastic Transcoder job. You specify metadata in
        <code>key/value</code> pairs, and you can add up to 10 <code>key/value</code> pairs per job. Elastic
        Transcoder does not guarantee that <code>key/value</code> pairs are returned in the same order in which
        you specify them.</p>
        <p>
        Metadata <code>keys</code> and <code>values</code> must use characters from the following list:
        </p>
        <ul>
        <li>
        <p>
        <code>0-9</code>
        </p>
        </li>
        <li>
        <p>
        <code>A-Z</code> and <code>a-z</code>
        </p>
        </li>
        <li>
        <p>
        <code>Space</code>
        </p>
        </li>
        <li>
        <p>
        The following symbols: <code>_.:/=+-%@</code>
        </p>
        </li>
aws-java-sdk-elastictranscoder/src/main/java/com/amazonaws/services/elastictranscoder/model/Job.java